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x86/amd-iommu: Add function to complete a tlb flush
[linux/fpc-iii.git] / drivers / net / usb / hso.c
blobfa4e58196c214f3eeea5afb5893625eed58e61ce
1 /******************************************************************************
2 *
3 * Driver for Option High Speed Mobile Devices.
4 *
5 * Copyright (C) 2008 Option International
6 * Filip Aben <f.aben@option.com>
7 * Denis Joseph Barrow <d.barow@option.com>
8 * Jan Dumon <j.dumon@option.com>
9 * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
10 * <ajb@spheresystems.co.uk>
11 * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
12 * Copyright (C) 2008 Novell, Inc.
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2 as
16 * published by the Free Software Foundation.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
26 * USA
27 *
28 *
29 *****************************************************************************/
30
31 /******************************************************************************
32 *
33 * Description of the device:
34 *
35 * Interface 0: Contains the IP network interface on the bulk end points.
36 * The multiplexed serial ports are using the interrupt and
37 * control endpoints.
38 * Interrupt contains a bitmap telling which multiplexed
39 * serialport needs servicing.
40 *
41 * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
42 * port is opened, as this have a huge impact on the network port
43 * throughput.
44 *
45 * Interface 2: Standard modem interface - circuit switched interface, this
46 * can be used to make a standard ppp connection however it
47 * should not be used in conjunction with the IP network interface
48 * enabled for USB performance reasons i.e. if using this set
49 * ideally disable_net=1.
50 *
51 *****************************************************************************/
52
53 #include <linux/sched.h>
54 #include <linux/slab.h>
55 #include <linux/init.h>
56 #include <linux/delay.h>
57 #include <linux/netdevice.h>
58 #include <linux/module.h>
59 #include <linux/ethtool.h>
60 #include <linux/usb.h>
61 #include <linux/timer.h>
62 #include <linux/tty.h>
63 #include <linux/tty_driver.h>
64 #include <linux/tty_flip.h>
65 #include <linux/kmod.h>
66 #include <linux/rfkill.h>
67 #include <linux/ip.h>
68 #include <linux/uaccess.h>
69 #include <linux/usb/cdc.h>
70 #include <net/arp.h>
71 #include <asm/byteorder.h>
72 #include <linux/serial_core.h>
73 #include <linux/serial.h>
74
75
76 #define DRIVER_VERSION "1.2"
77 #define MOD_AUTHOR "Option Wireless"
78 #define MOD_DESCRIPTION "USB High Speed Option driver"
79 #define MOD_LICENSE "GPL"
80
81 #define HSO_MAX_NET_DEVICES 10
82 #define HSO__MAX_MTU 2048
83 #define DEFAULT_MTU 1500
84 #define DEFAULT_MRU 1500
85
86 #define CTRL_URB_RX_SIZE 1024
87 #define CTRL_URB_TX_SIZE 64
88
89 #define BULK_URB_RX_SIZE 4096
90 #define BULK_URB_TX_SIZE 8192
91
92 #define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU
93 #define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU
94 #define MUX_BULK_RX_BUF_COUNT 4
95 #define USB_TYPE_OPTION_VENDOR 0x20
96
97 /* These definitions are used with the struct hso_net flags element */
98 /* - use *_bit operations on it. (bit indices not values.) */
99 #define HSO_NET_RUNNING 0
100
101 #define HSO_NET_TX_TIMEOUT (HZ*10)
102
103 #define HSO_SERIAL_MAGIC 0x48534f31
104
105 /* Number of ttys to handle */
106 #define HSO_SERIAL_TTY_MINORS 256
107
108 #define MAX_RX_URBS 2
109
110 static inline struct hso_serial *get_serial_by_tty(struct tty_struct *tty)
111 {
112 if (tty)
113 return tty->driver_data;
114 return NULL;
115 }
116
117 /*****************************************************************************/
118 /* Debugging functions */
119 /*****************************************************************************/
120 #define D__(lvl_, fmt, arg...) \
121 do { \
122 printk(lvl_ "[%d:%s]: " fmt "\n", \
123 __LINE__, __func__, ## arg); \
124 } while (0)
125
126 #define D_(lvl, args...) \
127 do { \
128 if (lvl & debug) \
129 D__(KERN_INFO, args); \
130 } while (0)
131
132 #define D1(args...) D_(0x01, ##args)
133 #define D2(args...) D_(0x02, ##args)
134 #define D3(args...) D_(0x04, ##args)
135 #define D4(args...) D_(0x08, ##args)
136 #define D5(args...) D_(0x10, ##args)
137
138 /*****************************************************************************/
139 /* Enumerators */
140 /*****************************************************************************/
141 enum pkt_parse_state {
142 WAIT_IP,
143 WAIT_DATA,
144 WAIT_SYNC
145 };
146
147 /*****************************************************************************/
148 /* Structs */
149 /*****************************************************************************/
150
151 struct hso_shared_int {
152 struct usb_endpoint_descriptor *intr_endp;
153 void *shared_intr_buf;
154 struct urb *shared_intr_urb;
155 struct usb_device *usb;
156 int use_count;
157 int ref_count;
158 struct mutex shared_int_lock;
159 };
160
161 struct hso_net {
162 struct hso_device *parent;
163 struct net_device *net;
164 struct rfkill *rfkill;
165
166 struct usb_endpoint_descriptor *in_endp;
167 struct usb_endpoint_descriptor *out_endp;
168
169 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
170 struct urb *mux_bulk_tx_urb;
171 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
172 void *mux_bulk_tx_buf;
173
174 struct sk_buff *skb_rx_buf;
175 struct sk_buff *skb_tx_buf;
176
177 enum pkt_parse_state rx_parse_state;
178 spinlock_t net_lock;
179
180 unsigned short rx_buf_size;
181 unsigned short rx_buf_missing;
182 struct iphdr rx_ip_hdr;
183
184 unsigned long flags;
185 };
186
187 enum rx_ctrl_state{
188 RX_IDLE,
189 RX_SENT,
190 RX_PENDING
191 };
192
193 #define BM_REQUEST_TYPE (0xa1)
194 #define B_NOTIFICATION (0x20)
195 #define W_VALUE (0x0)
196 #define W_INDEX (0x2)
197 #define W_LENGTH (0x2)
198
199 #define B_OVERRUN (0x1<<6)
200 #define B_PARITY (0x1<<5)
201 #define B_FRAMING (0x1<<4)
202 #define B_RING_SIGNAL (0x1<<3)
203 #define B_BREAK (0x1<<2)
204 #define B_TX_CARRIER (0x1<<1)
205 #define B_RX_CARRIER (0x1<<0)
206
207 struct hso_serial_state_notification {
208 u8 bmRequestType;
209 u8 bNotification;
210 u16 wValue;
211 u16 wIndex;
212 u16 wLength;
213 u16 UART_state_bitmap;
214 } __attribute__((packed));
215
216 struct hso_tiocmget {
217 struct mutex mutex;
218 wait_queue_head_t waitq;
219 int intr_completed;
220 struct usb_endpoint_descriptor *endp;
221 struct urb *urb;
222 struct hso_serial_state_notification serial_state_notification;
223 u16 prev_UART_state_bitmap;
224 struct uart_icount icount;
225 };
226
227
228 struct hso_serial {
229 struct hso_device *parent;
230 int magic;
231 u8 minor;
232
233 struct hso_shared_int *shared_int;
234
235 /* rx/tx urb could be either a bulk urb or a control urb depending
236 on which serial port it is used on. */
237 struct urb *rx_urb[MAX_RX_URBS];
238 u8 num_rx_urbs;
239 u8 *rx_data[MAX_RX_URBS];
240 u16 rx_data_length; /* should contain allocated length */
241
242 struct urb *tx_urb;
243 u8 *tx_data;
244 u8 *tx_buffer;
245 u16 tx_data_length; /* should contain allocated length */
246 u16 tx_data_count;
247 u16 tx_buffer_count;
248 struct usb_ctrlrequest ctrl_req_tx;
249 struct usb_ctrlrequest ctrl_req_rx;
250
251 struct usb_endpoint_descriptor *in_endp;
252 struct usb_endpoint_descriptor *out_endp;
253
254 enum rx_ctrl_state rx_state;
255 u8 rts_state;
256 u8 dtr_state;
257 unsigned tx_urb_used:1;
258
259 /* from usb_serial_port */
260 struct tty_struct *tty;
261 int open_count;
262 spinlock_t serial_lock;
263
264 int (*write_data) (struct hso_serial *serial);
265 struct hso_tiocmget *tiocmget;
266 /* Hacks required to get flow control
267 * working on the serial receive buffers
268 * so as not to drop characters on the floor.
269 */
270 int curr_rx_urb_idx;
271 u16 curr_rx_urb_offset;
272 u8 rx_urb_filled[MAX_RX_URBS];
273 struct tasklet_struct unthrottle_tasklet;
274 struct work_struct retry_unthrottle_workqueue;
275 };
276
277 struct hso_device {
278 union {
279 struct hso_serial *dev_serial;
280 struct hso_net *dev_net;
281 } port_data;
282
283 u32 port_spec;
284
285 u8 is_active;
286 u8 usb_gone;
287 struct work_struct async_get_intf;
288 struct work_struct async_put_intf;
289
290 struct usb_device *usb;
291 struct usb_interface *interface;
292
293 struct device *dev;
294 struct kref ref;
295 struct mutex mutex;
296 };
297
298 /* Type of interface */
299 #define HSO_INTF_MASK 0xFF00
300 #define HSO_INTF_MUX 0x0100
301 #define HSO_INTF_BULK 0x0200
302
303 /* Type of port */
304 #define HSO_PORT_MASK 0xFF
305 #define HSO_PORT_NO_PORT 0x0
306 #define HSO_PORT_CONTROL 0x1
307 #define HSO_PORT_APP 0x2
308 #define HSO_PORT_GPS 0x3
309 #define HSO_PORT_PCSC 0x4
310 #define HSO_PORT_APP2 0x5
311 #define HSO_PORT_GPS_CONTROL 0x6
312 #define HSO_PORT_MSD 0x7
313 #define HSO_PORT_VOICE 0x8
314 #define HSO_PORT_DIAG2 0x9
315 #define HSO_PORT_DIAG 0x10
316 #define HSO_PORT_MODEM 0x11
317 #define HSO_PORT_NETWORK 0x12
318
319 /* Additional device info */
320 #define HSO_INFO_MASK 0xFF000000
321 #define HSO_INFO_CRC_BUG 0x01000000
322
323 /*****************************************************************************/
324 /* Prototypes */
325 /*****************************************************************************/
326 /* Serial driver functions */
327 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
328 unsigned int set, unsigned int clear);
329 static void ctrl_callback(struct urb *urb);
330 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
331 static void hso_kick_transmit(struct hso_serial *serial);
332 /* Helper functions */
333 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
334 struct usb_device *usb, gfp_t gfp);
335 static void log_usb_status(int status, const char *function);
336 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
337 int type, int dir);
338 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
339 static void hso_free_interface(struct usb_interface *intf);
340 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
341 static int hso_stop_serial_device(struct hso_device *hso_dev);
342 static int hso_start_net_device(struct hso_device *hso_dev);
343 static void hso_free_shared_int(struct hso_shared_int *shared_int);
344 static int hso_stop_net_device(struct hso_device *hso_dev);
345 static void hso_serial_ref_free(struct kref *ref);
346 static void hso_std_serial_read_bulk_callback(struct urb *urb);
347 static int hso_mux_serial_read(struct hso_serial *serial);
348 static void async_get_intf(struct work_struct *data);
349 static void async_put_intf(struct work_struct *data);
350 static int hso_put_activity(struct hso_device *hso_dev);
351 static int hso_get_activity(struct hso_device *hso_dev);
352 static void tiocmget_intr_callback(struct urb *urb);
353 /*****************************************************************************/
354 /* Helping functions */
355 /*****************************************************************************/
356
357 /* #define DEBUG */
358
359 static inline struct hso_net *dev2net(struct hso_device *hso_dev)
360 {
361 return hso_dev->port_data.dev_net;
362 }
363
364 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
365 {
366 return hso_dev->port_data.dev_serial;
367 }
368
369 /* Debugging functions */
370 #ifdef DEBUG
371 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
372 unsigned int len)
373 {
374 static char name[255];
375
376 sprintf(name, "hso[%d:%s]", line_count, func_name);
377 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
378 }
379
380 #define DUMP(buf_, len_) \
381 dbg_dump(__LINE__, __func__, buf_, len_)
382
383 #define DUMP1(buf_, len_) \
384 do { \
385 if (0x01 & debug) \
386 DUMP(buf_, len_); \
387 } while (0)
388 #else
389 #define DUMP(buf_, len_)
390 #define DUMP1(buf_, len_)
391 #endif
392
393 /* module parameters */
394 static int debug;
395 static int tty_major;
396 static int disable_net;
397
398 /* driver info */
399 static const char driver_name[] = "hso";
400 static const char tty_filename[] = "ttyHS";
401 static const char *version = __FILE__ ": " DRIVER_VERSION " " MOD_AUTHOR;
402 /* the usb driver itself (registered in hso_init) */
403 static struct usb_driver hso_driver;
404 /* serial structures */
405 static struct tty_driver *tty_drv;
406 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
407 static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
408 static spinlock_t serial_table_lock;
409
410 static const s32 default_port_spec[] = {
411 HSO_INTF_MUX | HSO_PORT_NETWORK,
412 HSO_INTF_BULK | HSO_PORT_DIAG,
413 HSO_INTF_BULK | HSO_PORT_MODEM,
414 0
415 };
416
417 static const s32 icon321_port_spec[] = {
418 HSO_INTF_MUX | HSO_PORT_NETWORK,
419 HSO_INTF_BULK | HSO_PORT_DIAG2,
420 HSO_INTF_BULK | HSO_PORT_MODEM,
421 HSO_INTF_BULK | HSO_PORT_DIAG,
422 0
423 };
424
425 #define default_port_device(vendor, product) \
426 USB_DEVICE(vendor, product), \
427 .driver_info = (kernel_ulong_t)default_port_spec
428
429 #define icon321_port_device(vendor, product) \
430 USB_DEVICE(vendor, product), \
431 .driver_info = (kernel_ulong_t)icon321_port_spec
432
433 /* list of devices we support */
434 static const struct usb_device_id hso_ids[] = {
435 {default_port_device(0x0af0, 0x6711)},
436 {default_port_device(0x0af0, 0x6731)},
437 {default_port_device(0x0af0, 0x6751)},
438 {default_port_device(0x0af0, 0x6771)},
439 {default_port_device(0x0af0, 0x6791)},
440 {default_port_device(0x0af0, 0x6811)},
441 {default_port_device(0x0af0, 0x6911)},
442 {default_port_device(0x0af0, 0x6951)},
443 {default_port_device(0x0af0, 0x6971)},
444 {default_port_device(0x0af0, 0x7011)},
445 {default_port_device(0x0af0, 0x7031)},
446 {default_port_device(0x0af0, 0x7051)},
447 {default_port_device(0x0af0, 0x7071)},
448 {default_port_device(0x0af0, 0x7111)},
449 {default_port_device(0x0af0, 0x7211)},
450 {default_port_device(0x0af0, 0x7251)},
451 {default_port_device(0x0af0, 0x7271)},
452 {default_port_device(0x0af0, 0x7311)},
453 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */
454 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */
455 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */
456 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */
457 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */
458 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */
459 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */
460 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */
461 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */
462 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */
463 {USB_DEVICE(0x0af0, 0x7701)},
464 {USB_DEVICE(0x0af0, 0x7801)},
465 {USB_DEVICE(0x0af0, 0x7901)},
466 {USB_DEVICE(0x0af0, 0x8200)},
467 {USB_DEVICE(0x0af0, 0x8201)},
468 {USB_DEVICE(0x0af0, 0xd035)},
469 {USB_DEVICE(0x0af0, 0xd055)},
470 {USB_DEVICE(0x0af0, 0xd155)},
471 {USB_DEVICE(0x0af0, 0xd255)},
472 {USB_DEVICE(0x0af0, 0xd057)},
473 {USB_DEVICE(0x0af0, 0xd157)},
474 {USB_DEVICE(0x0af0, 0xd257)},
475 {USB_DEVICE(0x0af0, 0xd357)},
476 {}
477 };
478 MODULE_DEVICE_TABLE(usb, hso_ids);
479
480 /* Sysfs attribute */
481 static ssize_t hso_sysfs_show_porttype(struct device *dev,
482 struct device_attribute *attr,
483 char *buf)
484 {
485 struct hso_device *hso_dev = dev_get_drvdata(dev);
486 char *port_name;
487
488 if (!hso_dev)
489 return 0;
490
491 switch (hso_dev->port_spec & HSO_PORT_MASK) {
492 case HSO_PORT_CONTROL:
493 port_name = "Control";
494 break;
495 case HSO_PORT_APP:
496 port_name = "Application";
497 break;
498 case HSO_PORT_APP2:
499 port_name = "Application2";
500 break;
501 case HSO_PORT_GPS:
502 port_name = "GPS";
503 break;
504 case HSO_PORT_GPS_CONTROL:
505 port_name = "GPS Control";
506 break;
507 case HSO_PORT_PCSC:
508 port_name = "PCSC";
509 break;
510 case HSO_PORT_DIAG:
511 port_name = "Diagnostic";
512 break;
513 case HSO_PORT_DIAG2:
514 port_name = "Diagnostic2";
515 break;
516 case HSO_PORT_MODEM:
517 port_name = "Modem";
518 break;
519 case HSO_PORT_NETWORK:
520 port_name = "Network";
521 break;
522 default:
523 port_name = "Unknown";
524 break;
525 }
526
527 return sprintf(buf, "%s\n", port_name);
528 }
529 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
530
531 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
532 {
533 int idx;
534
535 for (idx = 0; idx < serial->num_rx_urbs; idx++)
536 if (serial->rx_urb[idx] == urb)
537 return idx;
538 dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
539 return -1;
540 }
541
542 /* converts mux value to a port spec value */
543 static u32 hso_mux_to_port(int mux)
544 {
545 u32 result;
546
547 switch (mux) {
548 case 0x1:
549 result = HSO_PORT_CONTROL;
550 break;
551 case 0x2:
552 result = HSO_PORT_APP;
553 break;
554 case 0x4:
555 result = HSO_PORT_PCSC;
556 break;
557 case 0x8:
558 result = HSO_PORT_GPS;
559 break;
560 case 0x10:
561 result = HSO_PORT_APP2;
562 break;
563 default:
564 result = HSO_PORT_NO_PORT;
565 }
566 return result;
567 }
568
569 /* converts port spec value to a mux value */
570 static u32 hso_port_to_mux(int port)
571 {
572 u32 result;
573
574 switch (port & HSO_PORT_MASK) {
575 case HSO_PORT_CONTROL:
576 result = 0x0;
577 break;
578 case HSO_PORT_APP:
579 result = 0x1;
580 break;
581 case HSO_PORT_PCSC:
582 result = 0x2;
583 break;
584 case HSO_PORT_GPS:
585 result = 0x3;
586 break;
587 case HSO_PORT_APP2:
588 result = 0x4;
589 break;
590 default:
591 result = 0x0;
592 }
593 return result;
594 }
595
596 static struct hso_serial *get_serial_by_shared_int_and_type(
597 struct hso_shared_int *shared_int,
598 int mux)
599 {
600 int i, port;
601
602 port = hso_mux_to_port(mux);
603
604 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
605 if (serial_table[i]
606 && (dev2ser(serial_table[i])->shared_int == shared_int)
607 && ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
608 return dev2ser(serial_table[i]);
609 }
610 }
611
612 return NULL;
613 }
614
615 static struct hso_serial *get_serial_by_index(unsigned index)
616 {
617 struct hso_serial *serial = NULL;
618 unsigned long flags;
619
620 spin_lock_irqsave(&serial_table_lock, flags);
621 if (serial_table[index])
622 serial = dev2ser(serial_table[index]);
623 spin_unlock_irqrestore(&serial_table_lock, flags);
624
625 return serial;
626 }
627
628 static int get_free_serial_index(void)
629 {
630 int index;
631 unsigned long flags;
632
633 spin_lock_irqsave(&serial_table_lock, flags);
634 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
635 if (serial_table[index] == NULL) {
636 spin_unlock_irqrestore(&serial_table_lock, flags);
637 return index;
638 }
639 }
640 spin_unlock_irqrestore(&serial_table_lock, flags);
641
642 printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
643 return -1;
644 }
645
646 static void set_serial_by_index(unsigned index, struct hso_serial *serial)
647 {
648 unsigned long flags;
649
650 spin_lock_irqsave(&serial_table_lock, flags);
651 if (serial)
652 serial_table[index] = serial->parent;
653 else
654 serial_table[index] = NULL;
655 spin_unlock_irqrestore(&serial_table_lock, flags);
656 }
657
658 /* log a meaningful explanation of an USB status */
659 static void log_usb_status(int status, const char *function)
660 {
661 char *explanation;
662
663 switch (status) {
664 case -ENODEV:
665 explanation = "no device";
666 break;
667 case -ENOENT:
668 explanation = "endpoint not enabled";
669 break;
670 case -EPIPE:
671 explanation = "endpoint stalled";
672 break;
673 case -ENOSPC:
674 explanation = "not enough bandwidth";
675 break;
676 case -ESHUTDOWN:
677 explanation = "device disabled";
678 break;
679 case -EHOSTUNREACH:
680 explanation = "device suspended";
681 break;
682 case -EINVAL:
683 case -EAGAIN:
684 case -EFBIG:
685 case -EMSGSIZE:
686 explanation = "internal error";
687 break;
688 default:
689 explanation = "unknown status";
690 break;
691 }
692 D1("%s: received USB status - %s (%d)", function, explanation, status);
693 }
694
695 /* Network interface functions */
696
697 /* called when net interface is brought up by ifconfig */
698 static int hso_net_open(struct net_device *net)
699 {
700 struct hso_net *odev = netdev_priv(net);
701 unsigned long flags = 0;
702
703 if (!odev) {
704 dev_err(&net->dev, "No net device !\n");
705 return -ENODEV;
706 }
707
708 odev->skb_tx_buf = NULL;
709
710 /* setup environment */
711 spin_lock_irqsave(&odev->net_lock, flags);
712 odev->rx_parse_state = WAIT_IP;
713 odev->rx_buf_size = 0;
714 odev->rx_buf_missing = sizeof(struct iphdr);
715 spin_unlock_irqrestore(&odev->net_lock, flags);
716
717 /* We are up and running. */
718 set_bit(HSO_NET_RUNNING, &odev->flags);
719 hso_start_net_device(odev->parent);
720
721 /* Tell the kernel we are ready to start receiving from it */
722 netif_start_queue(net);
723
724 return 0;
725 }
726
727 /* called when interface is brought down by ifconfig */
728 static int hso_net_close(struct net_device *net)
729 {
730 struct hso_net *odev = netdev_priv(net);
731
732 /* we don't need the queue anymore */
733 netif_stop_queue(net);
734 /* no longer running */
735 clear_bit(HSO_NET_RUNNING, &odev->flags);
736
737 hso_stop_net_device(odev->parent);
738
739 /* done */
740 return 0;
741 }
742
743 /* USB tells is xmit done, we should start the netqueue again */
744 static void write_bulk_callback(struct urb *urb)
745 {
746 struct hso_net *odev = urb->context;
747 int status = urb->status;
748
749 /* Sanity check */
750 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
751 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
752 return;
753 }
754
755 /* Do we still have a valid kernel network device? */
756 if (!netif_device_present(odev->net)) {
757 dev_err(&urb->dev->dev, "%s: net device not present\n",
758 __func__);
759 return;
760 }
761
762 /* log status, but don't act on it, we don't need to resubmit anything
763 * anyhow */
764 if (status)
765 log_usb_status(status, __func__);
766
767 hso_put_activity(odev->parent);
768
769 /* Tell the network interface we are ready for another frame */
770 netif_wake_queue(odev->net);
771 }
772
773 /* called by kernel when we need to transmit a packet */
774 static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
775 struct net_device *net)
776 {
777 struct hso_net *odev = netdev_priv(net);
778 int result;
779
780 /* Tell the kernel, "No more frames 'til we are done with this one." */
781 netif_stop_queue(net);
782 if (hso_get_activity(odev->parent) == -EAGAIN) {
783 odev->skb_tx_buf = skb;
784 return NETDEV_TX_OK;
785 }
786
787 /* log if asked */
788 DUMP1(skb->data, skb->len);
789 /* Copy it from kernel memory to OUR memory */
790 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
791 D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
792
793 /* Fill in the URB for shipping it out. */
794 usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
795 odev->parent->usb,
796 usb_sndbulkpipe(odev->parent->usb,
797 odev->out_endp->
798 bEndpointAddress & 0x7F),
799 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
800 odev);
801
802 /* Deal with the Zero Length packet problem, I hope */
803 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
804
805 /* Send the URB on its merry way. */
806 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
807 if (result) {
808 dev_warn(&odev->parent->interface->dev,
809 "failed mux_bulk_tx_urb %d", result);
810 net->stats.tx_errors++;
811 netif_start_queue(net);
812 } else {
813 net->stats.tx_packets++;
814 net->stats.tx_bytes += skb->len;
815 /* And tell the kernel when the last transmit started. */
816 net->trans_start = jiffies;
817 }
818 dev_kfree_skb(skb);
819 /* we're done */
820 return NETDEV_TX_OK;
821 }
822
823 static void hso_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info)
824 {
825 struct hso_net *odev = netdev_priv(net);
826
827 strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
828 strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
829 usb_make_path(odev->parent->usb, info->bus_info, sizeof info->bus_info);
830 }
831
832 static const struct ethtool_ops ops = {
833 .get_drvinfo = hso_get_drvinfo,
834 .get_link = ethtool_op_get_link
835 };
836
837 /* called when a packet did not ack after watchdogtimeout */
838 static void hso_net_tx_timeout(struct net_device *net)
839 {
840 struct hso_net *odev = netdev_priv(net);
841
842 if (!odev)
843 return;
844
845 /* Tell syslog we are hosed. */
846 dev_warn(&net->dev, "Tx timed out.\n");
847
848 /* Tear the waiting frame off the list */
849 if (odev->mux_bulk_tx_urb
850 && (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
851 usb_unlink_urb(odev->mux_bulk_tx_urb);
852
853 /* Update statistics */
854 net->stats.tx_errors++;
855 }
856
857 /* make a real packet from the received USB buffer */
858 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
859 unsigned int count, unsigned char is_eop)
860 {
861 unsigned short temp_bytes;
862 unsigned short buffer_offset = 0;
863 unsigned short frame_len;
864 unsigned char *tmp_rx_buf;
865
866 /* log if needed */
867 D1("Rx %d bytes", count);
868 DUMP(ip_pkt, min(128, (int)count));
869
870 while (count) {
871 switch (odev->rx_parse_state) {
872 case WAIT_IP:
873 /* waiting for IP header. */
874 /* wanted bytes - size of ip header */
875 temp_bytes =
876 (count <
877 odev->rx_buf_missing) ? count : odev->
878 rx_buf_missing;
879
880 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
881 odev->rx_buf_size, ip_pkt + buffer_offset,
882 temp_bytes);
883
884 odev->rx_buf_size += temp_bytes;
885 buffer_offset += temp_bytes;
886 odev->rx_buf_missing -= temp_bytes;
887 count -= temp_bytes;
888
889 if (!odev->rx_buf_missing) {
890 /* header is complete allocate an sk_buffer and
891 * continue to WAIT_DATA */
892 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
893
894 if ((frame_len > DEFAULT_MRU) ||
895 (frame_len < sizeof(struct iphdr))) {
896 dev_err(&odev->net->dev,
897 "Invalid frame (%d) length\n",
898 frame_len);
899 odev->rx_parse_state = WAIT_SYNC;
900 continue;
901 }
902 /* Allocate an sk_buff */
903 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
904 frame_len);
905 if (!odev->skb_rx_buf) {
906 /* We got no receive buffer. */
907 D1("could not allocate memory");
908 odev->rx_parse_state = WAIT_SYNC;
909 return;
910 }
911
912 /* Copy what we got so far. make room for iphdr
913 * after tail. */
914 tmp_rx_buf =
915 skb_put(odev->skb_rx_buf,
916 sizeof(struct iphdr));
917 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
918 sizeof(struct iphdr));
919
920 /* ETH_HLEN */
921 odev->rx_buf_size = sizeof(struct iphdr);
922
923 /* Filip actually use .tot_len */
924 odev->rx_buf_missing =
925 frame_len - sizeof(struct iphdr);
926 odev->rx_parse_state = WAIT_DATA;
927 }
928 break;
929
930 case WAIT_DATA:
931 temp_bytes = (count < odev->rx_buf_missing)
932 ? count : odev->rx_buf_missing;
933
934 /* Copy the rest of the bytes that are left in the
935 * buffer into the waiting sk_buf. */
936 /* Make room for temp_bytes after tail. */
937 tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
938 memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
939
940 odev->rx_buf_missing -= temp_bytes;
941 count -= temp_bytes;
942 buffer_offset += temp_bytes;
943 odev->rx_buf_size += temp_bytes;
944 if (!odev->rx_buf_missing) {
945 /* Packet is complete. Inject into stack. */
946 /* We have IP packet here */
947 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
948 /* don't check it */
949 odev->skb_rx_buf->ip_summed =
950 CHECKSUM_UNNECESSARY;
951
952 skb_reset_mac_header(odev->skb_rx_buf);
953
954 /* Ship it off to the kernel */
955 netif_rx(odev->skb_rx_buf);
956 /* No longer our buffer. */
957 odev->skb_rx_buf = NULL;
958
959 /* update out statistics */
960 odev->net->stats.rx_packets++;
961
962 odev->net->stats.rx_bytes += odev->rx_buf_size;
963
964 odev->rx_buf_size = 0;
965 odev->rx_buf_missing = sizeof(struct iphdr);
966 odev->rx_parse_state = WAIT_IP;
967 }
968 break;
969
970 case WAIT_SYNC:
971 D1(" W_S");
972 count = 0;
973 break;
974 default:
975 D1(" ");
976 count--;
977 break;
978 }
979 }
980
981 /* Recovery mechanism for WAIT_SYNC state. */
982 if (is_eop) {
983 if (odev->rx_parse_state == WAIT_SYNC) {
984 odev->rx_parse_state = WAIT_IP;
985 odev->rx_buf_size = 0;
986 odev->rx_buf_missing = sizeof(struct iphdr);
987 }
988 }
989 }
990
991 /* Moving data from usb to kernel (in interrupt state) */
992 static void read_bulk_callback(struct urb *urb)
993 {
994 struct hso_net *odev = urb->context;
995 struct net_device *net;
996 int result;
997 int status = urb->status;
998
999 /* is al ok? (Filip: Who's Al ?) */
1000 if (status) {
1001 log_usb_status(status, __func__);
1002 return;
1003 }
1004
1005 /* Sanity check */
1006 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1007 D1("BULK IN callback but driver is not active!");
1008 return;
1009 }
1010 usb_mark_last_busy(urb->dev);
1011
1012 net = odev->net;
1013
1014 if (!netif_device_present(net)) {
1015 /* Somebody killed our network interface... */
1016 return;
1017 }
1018
1019 if (odev->parent->port_spec & HSO_INFO_CRC_BUG) {
1020 u32 rest;
1021 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1022 rest = urb->actual_length % odev->in_endp->wMaxPacketSize;
1023 if (((rest == 5) || (rest == 6))
1024 && !memcmp(((u8 *) urb->transfer_buffer) +
1025 urb->actual_length - 4, crc_check, 4)) {
1026 urb->actual_length -= 4;
1027 }
1028 }
1029
1030 /* do we even have a packet? */
1031 if (urb->actual_length) {
1032 /* Handle the IP stream, add header and push it onto network
1033 * stack if the packet is complete. */
1034 spin_lock(&odev->net_lock);
1035 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1036 (urb->transfer_buffer_length >
1037 urb->actual_length) ? 1 : 0);
1038 spin_unlock(&odev->net_lock);
1039 }
1040
1041 /* We are done with this URB, resubmit it. Prep the USB to wait for
1042 * another frame. Reuse same as received. */
1043 usb_fill_bulk_urb(urb,
1044 odev->parent->usb,
1045 usb_rcvbulkpipe(odev->parent->usb,
1046 odev->in_endp->
1047 bEndpointAddress & 0x7F),
1048 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1049 read_bulk_callback, odev);
1050
1051 /* Give this to the USB subsystem so it can tell us when more data
1052 * arrives. */
1053 result = usb_submit_urb(urb, GFP_ATOMIC);
1054 if (result)
1055 dev_warn(&odev->parent->interface->dev,
1056 "%s failed submit mux_bulk_rx_urb %d", __func__,
1057 result);
1058 }
1059
1060 /* Serial driver functions */
1061
1062 static void hso_init_termios(struct ktermios *termios)
1063 {
1064 /*
1065 * The default requirements for this device are:
1066 */
1067 termios->c_iflag &=
1068 ~(IGNBRK /* disable ignore break */
1069 | BRKINT /* disable break causes interrupt */
1070 | PARMRK /* disable mark parity errors */
1071 | ISTRIP /* disable clear high bit of input characters */
1072 | INLCR /* disable translate NL to CR */
1073 | IGNCR /* disable ignore CR */
1074 | ICRNL /* disable translate CR to NL */
1075 | IXON); /* disable enable XON/XOFF flow control */
1076
1077 /* disable postprocess output characters */
1078 termios->c_oflag &= ~OPOST;
1079
1080 termios->c_lflag &=
1081 ~(ECHO /* disable echo input characters */
1082 | ECHONL /* disable echo new line */
1083 | ICANON /* disable erase, kill, werase, and rprnt
1084 special characters */
1085 | ISIG /* disable interrupt, quit, and suspend special
1086 characters */
1087 | IEXTEN); /* disable non-POSIX special characters */
1088
1089 termios->c_cflag &=
1090 ~(CSIZE /* no size */
1091 | PARENB /* disable parity bit */
1092 | CBAUD /* clear current baud rate */
1093 | CBAUDEX); /* clear current buad rate */
1094
1095 termios->c_cflag |= CS8; /* character size 8 bits */
1096
1097 /* baud rate 115200 */
1098 tty_termios_encode_baud_rate(termios, 115200, 115200);
1099 }
1100
1101 static void _hso_serial_set_termios(struct tty_struct *tty,
1102 struct ktermios *old)
1103 {
1104 struct hso_serial *serial = get_serial_by_tty(tty);
1105 struct ktermios *termios;
1106
1107 if (!serial) {
1108 printk(KERN_ERR "%s: no tty structures", __func__);
1109 return;
1110 }
1111
1112 D4("port %d", serial->minor);
1113
1114 /*
1115 * Fix up unsupported bits
1116 */
1117 termios = tty->termios;
1118 termios->c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1119
1120 termios->c_cflag &=
1121 ~(CSIZE /* no size */
1122 | PARENB /* disable parity bit */
1123 | CBAUD /* clear current baud rate */
1124 | CBAUDEX); /* clear current buad rate */
1125
1126 termios->c_cflag |= CS8; /* character size 8 bits */
1127
1128 /* baud rate 115200 */
1129 tty_encode_baud_rate(tty, 115200, 115200);
1130 }
1131
1132 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1133 {
1134 int result;
1135 #ifdef CONFIG_HSO_AUTOPM
1136 usb_mark_last_busy(urb->dev);
1137 #endif
1138 /* We are done with this URB, resubmit it. Prep the USB to wait for
1139 * another frame */
1140 usb_fill_bulk_urb(urb, serial->parent->usb,
1141 usb_rcvbulkpipe(serial->parent->usb,
1142 serial->in_endp->
1143 bEndpointAddress & 0x7F),
1144 urb->transfer_buffer, serial->rx_data_length,
1145 hso_std_serial_read_bulk_callback, serial);
1146 /* Give this to the USB subsystem so it can tell us when more data
1147 * arrives. */
1148 result = usb_submit_urb(urb, GFP_ATOMIC);
1149 if (result) {
1150 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1151 __func__, result);
1152 }
1153 }
1154
1155
1156
1157
1158 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1159 {
1160 int count;
1161 struct urb *curr_urb;
1162
1163 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1164 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1165 count = put_rxbuf_data(curr_urb, serial);
1166 if (count == -1)
1167 return;
1168 if (count == 0) {
1169 serial->curr_rx_urb_idx++;
1170 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1171 serial->curr_rx_urb_idx = 0;
1172 hso_resubmit_rx_bulk_urb(serial, curr_urb);
1173 }
1174 }
1175 }
1176
1177 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1178 {
1179 int count = 0;
1180 struct urb *urb;
1181
1182 urb = serial->rx_urb[0];
1183 if (serial->open_count > 0) {
1184 count = put_rxbuf_data(urb, serial);
1185 if (count == -1)
1186 return;
1187 }
1188 /* Re issue a read as long as we receive data. */
1189
1190 if (count == 0 && ((urb->actual_length != 0) ||
1191 (serial->rx_state == RX_PENDING))) {
1192 serial->rx_state = RX_SENT;
1193 hso_mux_serial_read(serial);
1194 } else
1195 serial->rx_state = RX_IDLE;
1196 }
1197
1198
1199 /* read callback for Diag and CS port */
1200 static void hso_std_serial_read_bulk_callback(struct urb *urb)
1201 {
1202 struct hso_serial *serial = urb->context;
1203 int status = urb->status;
1204
1205 /* sanity check */
1206 if (!serial) {
1207 D1("serial == NULL");
1208 return;
1209 } else if (status) {
1210 log_usb_status(status, __func__);
1211 return;
1212 }
1213
1214 D4("\n--- Got serial_read_bulk callback %02x ---", status);
1215 D1("Actual length = %d\n", urb->actual_length);
1216 DUMP1(urb->transfer_buffer, urb->actual_length);
1217
1218 /* Anyone listening? */
1219 if (serial->open_count == 0)
1220 return;
1221
1222 if (status == 0) {
1223 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) {
1224 u32 rest;
1225 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1226 rest =
1227 urb->actual_length %
1228 serial->in_endp->wMaxPacketSize;
1229 if (((rest == 5) || (rest == 6))
1230 && !memcmp(((u8 *) urb->transfer_buffer) +
1231 urb->actual_length - 4, crc_check, 4)) {
1232 urb->actual_length -= 4;
1233 }
1234 }
1235 /* Valid data, handle RX data */
1236 spin_lock(&serial->serial_lock);
1237 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1238 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1239 spin_unlock(&serial->serial_lock);
1240 } else if (status == -ENOENT || status == -ECONNRESET) {
1241 /* Unlinked - check for throttled port. */
1242 D2("Port %d, successfully unlinked urb", serial->minor);
1243 spin_lock(&serial->serial_lock);
1244 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
1245 hso_resubmit_rx_bulk_urb(serial, urb);
1246 spin_unlock(&serial->serial_lock);
1247 } else {
1248 D2("Port %d, status = %d for read urb", serial->minor, status);
1249 return;
1250 }
1251 }
1252
1253 /*
1254 * This needs to be a tasklet otherwise we will
1255 * end up recursively calling this function.
1256 */
1257 static void hso_unthrottle_tasklet(struct hso_serial *serial)
1258 {
1259 unsigned long flags;
1260
1261 spin_lock_irqsave(&serial->serial_lock, flags);
1262 if ((serial->parent->port_spec & HSO_INTF_MUX))
1263 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1264 else
1265 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1266 spin_unlock_irqrestore(&serial->serial_lock, flags);
1267 }
1268
1269 static void hso_unthrottle(struct tty_struct *tty)
1270 {
1271 struct hso_serial *serial = get_serial_by_tty(tty);
1272
1273 tasklet_hi_schedule(&serial->unthrottle_tasklet);
1274 }
1275
1276 static void hso_unthrottle_workfunc(struct work_struct *work)
1277 {
1278 struct hso_serial *serial =
1279 container_of(work, struct hso_serial,
1280 retry_unthrottle_workqueue);
1281 hso_unthrottle_tasklet(serial);
1282 }
1283
1284 /* open the requested serial port */
1285 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1286 {
1287 struct hso_serial *serial = get_serial_by_index(tty->index);
1288 int result;
1289
1290 /* sanity check */
1291 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1292 WARN_ON(1);
1293 tty->driver_data = NULL;
1294 D1("Failed to open port");
1295 return -ENODEV;
1296 }
1297
1298 mutex_lock(&serial->parent->mutex);
1299 result = usb_autopm_get_interface(serial->parent->interface);
1300 if (result < 0)
1301 goto err_out;
1302
1303 D1("Opening %d", serial->minor);
1304 kref_get(&serial->parent->ref);
1305
1306 /* setup */
1307 spin_lock_irq(&serial->serial_lock);
1308 tty->driver_data = serial;
1309 tty_kref_put(serial->tty);
1310 serial->tty = tty_kref_get(tty);
1311 spin_unlock_irq(&serial->serial_lock);
1312
1313 /* check for port already opened, if not set the termios */
1314 serial->open_count++;
1315 if (serial->open_count == 1) {
1316 tty->low_latency = 1;
1317 serial->rx_state = RX_IDLE;
1318 /* Force default termio settings */
1319 _hso_serial_set_termios(tty, NULL);
1320 tasklet_init(&serial->unthrottle_tasklet,
1321 (void (*)(unsigned long))hso_unthrottle_tasklet,
1322 (unsigned long)serial);
1323 INIT_WORK(&serial->retry_unthrottle_workqueue,
1324 hso_unthrottle_workfunc);
1325 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1326 if (result) {
1327 hso_stop_serial_device(serial->parent);
1328 serial->open_count--;
1329 kref_put(&serial->parent->ref, hso_serial_ref_free);
1330 }
1331 } else {
1332 D1("Port was already open");
1333 }
1334
1335 usb_autopm_put_interface(serial->parent->interface);
1336
1337 /* done */
1338 if (result)
1339 hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0);
1340 err_out:
1341 mutex_unlock(&serial->parent->mutex);
1342 return result;
1343 }
1344
1345 /* close the requested serial port */
1346 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1347 {
1348 struct hso_serial *serial = tty->driver_data;
1349 u8 usb_gone;
1350
1351 D1("Closing serial port");
1352
1353 /* Open failed, no close cleanup required */
1354 if (serial == NULL)
1355 return;
1356
1357 mutex_lock(&serial->parent->mutex);
1358 usb_gone = serial->parent->usb_gone;
1359
1360 if (!usb_gone)
1361 usb_autopm_get_interface(serial->parent->interface);
1362
1363 /* reset the rts and dtr */
1364 /* do the actual close */
1365 serial->open_count--;
1366 kref_put(&serial->parent->ref, hso_serial_ref_free);
1367 if (serial->open_count <= 0) {
1368 serial->open_count = 0;
1369 spin_lock_irq(&serial->serial_lock);
1370 if (serial->tty == tty) {
1371 serial->tty->driver_data = NULL;
1372 serial->tty = NULL;
1373 tty_kref_put(tty);
1374 }
1375 spin_unlock_irq(&serial->serial_lock);
1376 if (!usb_gone)
1377 hso_stop_serial_device(serial->parent);
1378 tasklet_kill(&serial->unthrottle_tasklet);
1379 cancel_work_sync(&serial->retry_unthrottle_workqueue);
1380 }
1381
1382 if (!usb_gone)
1383 usb_autopm_put_interface(serial->parent->interface);
1384
1385 mutex_unlock(&serial->parent->mutex);
1386 }
1387
1388 /* close the requested serial port */
1389 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1390 int count)
1391 {
1392 struct hso_serial *serial = get_serial_by_tty(tty);
1393 int space, tx_bytes;
1394 unsigned long flags;
1395
1396 /* sanity check */
1397 if (serial == NULL) {
1398 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1399 return -ENODEV;
1400 }
1401
1402 spin_lock_irqsave(&serial->serial_lock, flags);
1403
1404 space = serial->tx_data_length - serial->tx_buffer_count;
1405 tx_bytes = (count < space) ? count : space;
1406
1407 if (!tx_bytes)
1408 goto out;
1409
1410 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1411 serial->tx_buffer_count += tx_bytes;
1412
1413 out:
1414 spin_unlock_irqrestore(&serial->serial_lock, flags);
1415
1416 hso_kick_transmit(serial);
1417 /* done */
1418 return tx_bytes;
1419 }
1420
1421 /* how much room is there for writing */
1422 static int hso_serial_write_room(struct tty_struct *tty)
1423 {
1424 struct hso_serial *serial = get_serial_by_tty(tty);
1425 int room;
1426 unsigned long flags;
1427
1428 spin_lock_irqsave(&serial->serial_lock, flags);
1429 room = serial->tx_data_length - serial->tx_buffer_count;
1430 spin_unlock_irqrestore(&serial->serial_lock, flags);
1431
1432 /* return free room */
1433 return room;
1434 }
1435
1436 /* setup the term */
1437 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1438 {
1439 struct hso_serial *serial = get_serial_by_tty(tty);
1440 unsigned long flags;
1441
1442 if (old)
1443 D5("Termios called with: cflags new[%d] - old[%d]",
1444 tty->termios->c_cflag, old->c_cflag);
1445
1446 /* the actual setup */
1447 spin_lock_irqsave(&serial->serial_lock, flags);
1448 if (serial->open_count)
1449 _hso_serial_set_termios(tty, old);
1450 else
1451 tty->termios = old;
1452 spin_unlock_irqrestore(&serial->serial_lock, flags);
1453
1454 /* done */
1455 return;
1456 }
1457
1458 /* how many characters in the buffer */
1459 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1460 {
1461 struct hso_serial *serial = get_serial_by_tty(tty);
1462 int chars;
1463 unsigned long flags;
1464
1465 /* sanity check */
1466 if (serial == NULL)
1467 return 0;
1468
1469 spin_lock_irqsave(&serial->serial_lock, flags);
1470 chars = serial->tx_buffer_count;
1471 spin_unlock_irqrestore(&serial->serial_lock, flags);
1472
1473 return chars;
1474 }
1475 static int tiocmget_submit_urb(struct hso_serial *serial,
1476 struct hso_tiocmget *tiocmget,
1477 struct usb_device *usb)
1478 {
1479 int result;
1480
1481 if (serial->parent->usb_gone)
1482 return -ENODEV;
1483 usb_fill_int_urb(tiocmget->urb, usb,
1484 usb_rcvintpipe(usb,
1485 tiocmget->endp->
1486 bEndpointAddress & 0x7F),
1487 &tiocmget->serial_state_notification,
1488 sizeof(struct hso_serial_state_notification),
1489 tiocmget_intr_callback, serial,
1490 tiocmget->endp->bInterval);
1491 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1492 if (result) {
1493 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1494 result);
1495 }
1496 return result;
1497
1498 }
1499
1500 static void tiocmget_intr_callback(struct urb *urb)
1501 {
1502 struct hso_serial *serial = urb->context;
1503 struct hso_tiocmget *tiocmget;
1504 int status = urb->status;
1505 u16 UART_state_bitmap, prev_UART_state_bitmap;
1506 struct uart_icount *icount;
1507 struct hso_serial_state_notification *serial_state_notification;
1508 struct usb_device *usb;
1509
1510 /* Sanity checks */
1511 if (!serial)
1512 return;
1513 if (status) {
1514 log_usb_status(status, __func__);
1515 return;
1516 }
1517 tiocmget = serial->tiocmget;
1518 if (!tiocmget)
1519 return;
1520 usb = serial->parent->usb;
1521 serial_state_notification = &tiocmget->serial_state_notification;
1522 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1523 serial_state_notification->bNotification != B_NOTIFICATION ||
1524 le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1525 le16_to_cpu(serial_state_notification->wIndex) != W_INDEX ||
1526 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1527 dev_warn(&usb->dev,
1528 "hso received invalid serial state notification\n");
1529 DUMP(serial_state_notification,
1530 sizeof(hso_serial_state_notifation))
1531 } else {
1532
1533 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1534 UART_state_bitmap);
1535 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1536 icount = &tiocmget->icount;
1537 spin_lock(&serial->serial_lock);
1538 if ((UART_state_bitmap & B_OVERRUN) !=
1539 (prev_UART_state_bitmap & B_OVERRUN))
1540 icount->parity++;
1541 if ((UART_state_bitmap & B_PARITY) !=
1542 (prev_UART_state_bitmap & B_PARITY))
1543 icount->parity++;
1544 if ((UART_state_bitmap & B_FRAMING) !=
1545 (prev_UART_state_bitmap & B_FRAMING))
1546 icount->frame++;
1547 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1548 !(prev_UART_state_bitmap & B_RING_SIGNAL))
1549 icount->rng++;
1550 if ((UART_state_bitmap & B_BREAK) !=
1551 (prev_UART_state_bitmap & B_BREAK))
1552 icount->brk++;
1553 if ((UART_state_bitmap & B_TX_CARRIER) !=
1554 (prev_UART_state_bitmap & B_TX_CARRIER))
1555 icount->dsr++;
1556 if ((UART_state_bitmap & B_RX_CARRIER) !=
1557 (prev_UART_state_bitmap & B_RX_CARRIER))
1558 icount->dcd++;
1559 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1560 spin_unlock(&serial->serial_lock);
1561 tiocmget->intr_completed = 1;
1562 wake_up_interruptible(&tiocmget->waitq);
1563 }
1564 memset(serial_state_notification, 0,
1565 sizeof(struct hso_serial_state_notification));
1566 tiocmget_submit_urb(serial,
1567 tiocmget,
1568 serial->parent->usb);
1569 }
1570
1571 /*
1572 * next few functions largely stolen from drivers/serial/serial_core.c
1573 */
1574 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1575 * - mask passed in arg for lines of interest
1576 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1577 * Caller should use TIOCGICOUNT to see which one it was
1578 */
1579 static int
1580 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1581 {
1582 DECLARE_WAITQUEUE(wait, current);
1583 struct uart_icount cprev, cnow;
1584 struct hso_tiocmget *tiocmget;
1585 int ret;
1586
1587 tiocmget = serial->tiocmget;
1588 if (!tiocmget)
1589 return -ENOENT;
1590 /*
1591 * note the counters on entry
1592 */
1593 spin_lock_irq(&serial->serial_lock);
1594 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1595 spin_unlock_irq(&serial->serial_lock);
1596 add_wait_queue(&tiocmget->waitq, &wait);
1597 for (;;) {
1598 spin_lock_irq(&serial->serial_lock);
1599 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1600 spin_unlock_irq(&serial->serial_lock);
1601 set_current_state(TASK_INTERRUPTIBLE);
1602 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1603 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1604 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) {
1605 ret = 0;
1606 break;
1607 }
1608 schedule();
1609 /* see if a signal did it */
1610 if (signal_pending(current)) {
1611 ret = -ERESTARTSYS;
1612 break;
1613 }
1614 cprev = cnow;
1615 }
1616 current->state = TASK_RUNNING;
1617 remove_wait_queue(&tiocmget->waitq, &wait);
1618
1619 return ret;
1620 }
1621
1622 /*
1623 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1624 * Return: write counters to the user passed counter struct
1625 * NB: both 1->0 and 0->1 transitions are counted except for
1626 * RI where only 0->1 is counted.
1627 */
1628 static int hso_get_count(struct hso_serial *serial,
1629 struct serial_icounter_struct __user *icnt)
1630 {
1631 struct serial_icounter_struct icount;
1632 struct uart_icount cnow;
1633 struct hso_tiocmget *tiocmget = serial->tiocmget;
1634
1635 if (!tiocmget)
1636 return -ENOENT;
1637 spin_lock_irq(&serial->serial_lock);
1638 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1639 spin_unlock_irq(&serial->serial_lock);
1640
1641 icount.cts = cnow.cts;
1642 icount.dsr = cnow.dsr;
1643 icount.rng = cnow.rng;
1644 icount.dcd = cnow.dcd;
1645 icount.rx = cnow.rx;
1646 icount.tx = cnow.tx;
1647 icount.frame = cnow.frame;
1648 icount.overrun = cnow.overrun;
1649 icount.parity = cnow.parity;
1650 icount.brk = cnow.brk;
1651 icount.buf_overrun = cnow.buf_overrun;
1652
1653 return copy_to_user(icnt, &icount, sizeof(icount)) ? -EFAULT : 0;
1654 }
1655
1656
1657 static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file)
1658 {
1659 int retval;
1660 struct hso_serial *serial = get_serial_by_tty(tty);
1661 struct hso_tiocmget *tiocmget;
1662 u16 UART_state_bitmap;
1663
1664 /* sanity check */
1665 if (!serial) {
1666 D1("no tty structures");
1667 return -EINVAL;
1668 }
1669 spin_lock_irq(&serial->serial_lock);
1670 retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1671 ((serial->dtr_state) ? TIOCM_DTR : 0);
1672 tiocmget = serial->tiocmget;
1673 if (tiocmget) {
1674
1675 UART_state_bitmap = le16_to_cpu(
1676 tiocmget->prev_UART_state_bitmap);
1677 if (UART_state_bitmap & B_RING_SIGNAL)
1678 retval |= TIOCM_RNG;
1679 if (UART_state_bitmap & B_RX_CARRIER)
1680 retval |= TIOCM_CD;
1681 if (UART_state_bitmap & B_TX_CARRIER)
1682 retval |= TIOCM_DSR;
1683 }
1684 spin_unlock_irq(&serial->serial_lock);
1685 return retval;
1686 }
1687
1688 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
1689 unsigned int set, unsigned int clear)
1690 {
1691 int val = 0;
1692 unsigned long flags;
1693 int if_num;
1694 struct hso_serial *serial = get_serial_by_tty(tty);
1695
1696 /* sanity check */
1697 if (!serial) {
1698 D1("no tty structures");
1699 return -EINVAL;
1700 }
1701 if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1702
1703 spin_lock_irqsave(&serial->serial_lock, flags);
1704 if (set & TIOCM_RTS)
1705 serial->rts_state = 1;
1706 if (set & TIOCM_DTR)
1707 serial->dtr_state = 1;
1708
1709 if (clear & TIOCM_RTS)
1710 serial->rts_state = 0;
1711 if (clear & TIOCM_DTR)
1712 serial->dtr_state = 0;
1713
1714 if (serial->dtr_state)
1715 val |= 0x01;
1716 if (serial->rts_state)
1717 val |= 0x02;
1718
1719 spin_unlock_irqrestore(&serial->serial_lock, flags);
1720
1721 return usb_control_msg(serial->parent->usb,
1722 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1723 0x21, val, if_num, NULL, 0,
1724 USB_CTRL_SET_TIMEOUT);
1725 }
1726
1727 static int hso_serial_ioctl(struct tty_struct *tty, struct file *file,
1728 unsigned int cmd, unsigned long arg)
1729 {
1730 struct hso_serial *serial = get_serial_by_tty(tty);
1731 void __user *uarg = (void __user *)arg;
1732 int ret = 0;
1733 D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1734
1735 if (!serial)
1736 return -ENODEV;
1737 switch (cmd) {
1738 case TIOCMIWAIT:
1739 ret = hso_wait_modem_status(serial, arg);
1740 break;
1741
1742 case TIOCGICOUNT:
1743 ret = hso_get_count(serial, uarg);
1744 break;
1745 default:
1746 ret = -ENOIOCTLCMD;
1747 break;
1748 }
1749 return ret;
1750 }
1751
1752
1753 /* starts a transmit */
1754 static void hso_kick_transmit(struct hso_serial *serial)
1755 {
1756 u8 *temp;
1757 unsigned long flags;
1758 int res;
1759
1760 spin_lock_irqsave(&serial->serial_lock, flags);
1761 if (!serial->tx_buffer_count)
1762 goto out;
1763
1764 if (serial->tx_urb_used)
1765 goto out;
1766
1767 /* Wakeup USB interface if necessary */
1768 if (hso_get_activity(serial->parent) == -EAGAIN)
1769 goto out;
1770
1771 /* Switch pointers around to avoid memcpy */
1772 temp = serial->tx_buffer;
1773 serial->tx_buffer = serial->tx_data;
1774 serial->tx_data = temp;
1775 serial->tx_data_count = serial->tx_buffer_count;
1776 serial->tx_buffer_count = 0;
1777
1778 /* If temp is set, it means we switched buffers */
1779 if (temp && serial->write_data) {
1780 res = serial->write_data(serial);
1781 if (res >= 0)
1782 serial->tx_urb_used = 1;
1783 }
1784 out:
1785 spin_unlock_irqrestore(&serial->serial_lock, flags);
1786 }
1787
1788 /* make a request (for reading and writing data to muxed serial port) */
1789 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1790 struct urb *ctrl_urb,
1791 struct usb_ctrlrequest *ctrl_req,
1792 u8 *ctrl_urb_data, u32 size)
1793 {
1794 int result;
1795 int pipe;
1796
1797 /* Sanity check */
1798 if (!serial || !ctrl_urb || !ctrl_req) {
1799 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1800 return -EINVAL;
1801 }
1802
1803 /* initialize */
1804 ctrl_req->wValue = 0;
1805 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1806 ctrl_req->wLength = cpu_to_le16(size);
1807
1808 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1809 /* Reading command */
1810 ctrl_req->bRequestType = USB_DIR_IN |
1811 USB_TYPE_OPTION_VENDOR |
1812 USB_RECIP_INTERFACE;
1813 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1814 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1815 } else {
1816 /* Writing command */
1817 ctrl_req->bRequestType = USB_DIR_OUT |
1818 USB_TYPE_OPTION_VENDOR |
1819 USB_RECIP_INTERFACE;
1820 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1821 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1822 }
1823 /* syslog */
1824 D2("%s command (%02x) len: %d, port: %d",
1825 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1826 ctrl_req->bRequestType, ctrl_req->wLength, port);
1827
1828 /* Load ctrl urb */
1829 ctrl_urb->transfer_flags = 0;
1830 usb_fill_control_urb(ctrl_urb,
1831 serial->parent->usb,
1832 pipe,
1833 (u8 *) ctrl_req,
1834 ctrl_urb_data, size, ctrl_callback, serial);
1835 /* Send it on merry way */
1836 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1837 if (result) {
1838 dev_err(&ctrl_urb->dev->dev,
1839 "%s failed submit ctrl_urb %d type %d", __func__,
1840 result, type);
1841 return result;
1842 }
1843
1844 /* done */
1845 return size;
1846 }
1847
1848 /* called by intr_callback when read occurs */
1849 static int hso_mux_serial_read(struct hso_serial *serial)
1850 {
1851 if (!serial)
1852 return -EINVAL;
1853
1854 /* clean data */
1855 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1856 /* make the request */
1857
1858 if (serial->num_rx_urbs != 1) {
1859 dev_err(&serial->parent->interface->dev,
1860 "ERROR: mux'd reads with multiple buffers "
1861 "not possible\n");
1862 return 0;
1863 }
1864 return mux_device_request(serial,
1865 USB_CDC_GET_ENCAPSULATED_RESPONSE,
1866 serial->parent->port_spec & HSO_PORT_MASK,
1867 serial->rx_urb[0],
1868 &serial->ctrl_req_rx,
1869 serial->rx_data[0], serial->rx_data_length);
1870 }
1871
1872 /* used for muxed serial port callback (muxed serial read) */
1873 static void intr_callback(struct urb *urb)
1874 {
1875 struct hso_shared_int *shared_int = urb->context;
1876 struct hso_serial *serial;
1877 unsigned char *port_req;
1878 int status = urb->status;
1879 int i;
1880
1881 usb_mark_last_busy(urb->dev);
1882
1883 /* sanity check */
1884 if (!shared_int)
1885 return;
1886
1887 /* status check */
1888 if (status) {
1889 log_usb_status(status, __func__);
1890 return;
1891 }
1892 D4("\n--- Got intr callback 0x%02X ---", status);
1893
1894 /* what request? */
1895 port_req = urb->transfer_buffer;
1896 D4(" port_req = 0x%.2X\n", *port_req);
1897 /* loop over all muxed ports to find the one sending this */
1898 for (i = 0; i < 8; i++) {
1899 /* max 8 channels on MUX */
1900 if (*port_req & (1 << i)) {
1901 serial = get_serial_by_shared_int_and_type(shared_int,
1902 (1 << i));
1903 if (serial != NULL) {
1904 D1("Pending read interrupt on port %d\n", i);
1905 spin_lock(&serial->serial_lock);
1906 if (serial->rx_state == RX_IDLE) {
1907 /* Setup and send a ctrl req read on
1908 * port i */
1909 if (!serial->rx_urb_filled[0]) {
1910 serial->rx_state = RX_SENT;
1911 hso_mux_serial_read(serial);
1912 } else
1913 serial->rx_state = RX_PENDING;
1914
1915 } else {
1916 D1("Already pending a read on "
1917 "port %d\n", i);
1918 }
1919 spin_unlock(&serial->serial_lock);
1920 }
1921 }
1922 }
1923 /* Resubmit interrupt urb */
1924 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1925 }
1926
1927 /* called for writing to muxed serial port */
1928 static int hso_mux_serial_write_data(struct hso_serial *serial)
1929 {
1930 if (NULL == serial)
1931 return -EINVAL;
1932
1933 return mux_device_request(serial,
1934 USB_CDC_SEND_ENCAPSULATED_COMMAND,
1935 serial->parent->port_spec & HSO_PORT_MASK,
1936 serial->tx_urb,
1937 &serial->ctrl_req_tx,
1938 serial->tx_data, serial->tx_data_count);
1939 }
1940
1941 /* write callback for Diag and CS port */
1942 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1943 {
1944 struct hso_serial *serial = urb->context;
1945 int status = urb->status;
1946 struct tty_struct *tty;
1947
1948 /* sanity check */
1949 if (!serial) {
1950 D1("serial == NULL");
1951 return;
1952 }
1953
1954 spin_lock(&serial->serial_lock);
1955 serial->tx_urb_used = 0;
1956 tty = tty_kref_get(serial->tty);
1957 spin_unlock(&serial->serial_lock);
1958 if (status) {
1959 log_usb_status(status, __func__);
1960 tty_kref_put(tty);
1961 return;
1962 }
1963 hso_put_activity(serial->parent);
1964 if (tty) {
1965 tty_wakeup(tty);
1966 tty_kref_put(tty);
1967 }
1968 hso_kick_transmit(serial);
1969
1970 D1(" ");
1971 return;
1972 }
1973
1974 /* called for writing diag or CS serial port */
1975 static int hso_std_serial_write_data(struct hso_serial *serial)
1976 {
1977 int count = serial->tx_data_count;
1978 int result;
1979
1980 usb_fill_bulk_urb(serial->tx_urb,
1981 serial->parent->usb,
1982 usb_sndbulkpipe(serial->parent->usb,
1983 serial->out_endp->
1984 bEndpointAddress & 0x7F),
1985 serial->tx_data, serial->tx_data_count,
1986 hso_std_serial_write_bulk_callback, serial);
1987
1988 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1989 if (result) {
1990 dev_warn(&serial->parent->usb->dev,
1991 "Failed to submit urb - res %d\n", result);
1992 return result;
1993 }
1994
1995 return count;
1996 }
1997
1998 /* callback after read or write on muxed serial port */
1999 static void ctrl_callback(struct urb *urb)
2000 {
2001 struct hso_serial *serial = urb->context;
2002 struct usb_ctrlrequest *req;
2003 int status = urb->status;
2004 struct tty_struct *tty;
2005
2006 /* sanity check */
2007 if (!serial)
2008 return;
2009
2010 spin_lock(&serial->serial_lock);
2011 serial->tx_urb_used = 0;
2012 tty = tty_kref_get(serial->tty);
2013 spin_unlock(&serial->serial_lock);
2014 if (status) {
2015 log_usb_status(status, __func__);
2016 tty_kref_put(tty);
2017 return;
2018 }
2019
2020 /* what request? */
2021 req = (struct usb_ctrlrequest *)(urb->setup_packet);
2022 D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
2023 D4("Actual length of urb = %d\n", urb->actual_length);
2024 DUMP1(urb->transfer_buffer, urb->actual_length);
2025
2026 if (req->bRequestType ==
2027 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
2028 /* response to a read command */
2029 serial->rx_urb_filled[0] = 1;
2030 spin_lock(&serial->serial_lock);
2031 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2032 spin_unlock(&serial->serial_lock);
2033 } else {
2034 hso_put_activity(serial->parent);
2035 if (tty)
2036 tty_wakeup(tty);
2037 /* response to a write command */
2038 hso_kick_transmit(serial);
2039 }
2040 tty_kref_put(tty);
2041 }
2042
2043 /* handle RX data for serial port */
2044 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2045 {
2046 struct tty_struct *tty;
2047 int write_length_remaining = 0;
2048 int curr_write_len;
2049
2050 /* Sanity check */
2051 if (urb == NULL || serial == NULL) {
2052 D1("serial = NULL");
2053 return -2;
2054 }
2055
2056 /* All callers to put_rxbuf_data hold serial_lock */
2057 tty = tty_kref_get(serial->tty);
2058
2059 /* Push data to tty */
2060 if (tty) {
2061 write_length_remaining = urb->actual_length -
2062 serial->curr_rx_urb_offset;
2063 D1("data to push to tty");
2064 while (write_length_remaining) {
2065 if (test_bit(TTY_THROTTLED, &tty->flags)) {
2066 tty_kref_put(tty);
2067 return -1;
2068 }
2069 curr_write_len = tty_insert_flip_string
2070 (tty, urb->transfer_buffer +
2071 serial->curr_rx_urb_offset,
2072 write_length_remaining);
2073 serial->curr_rx_urb_offset += curr_write_len;
2074 write_length_remaining -= curr_write_len;
2075 tty_flip_buffer_push(tty);
2076 }
2077 }
2078 if (write_length_remaining == 0) {
2079 serial->curr_rx_urb_offset = 0;
2080 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2081 }
2082 tty_kref_put(tty);
2083 return write_length_remaining;
2084 }
2085
2086
2087 /* Base driver functions */
2088
2089 static void hso_log_port(struct hso_device *hso_dev)
2090 {
2091 char *port_type;
2092 char port_dev[20];
2093
2094 switch (hso_dev->port_spec & HSO_PORT_MASK) {
2095 case HSO_PORT_CONTROL:
2096 port_type = "Control";
2097 break;
2098 case HSO_PORT_APP:
2099 port_type = "Application";
2100 break;
2101 case HSO_PORT_GPS:
2102 port_type = "GPS";
2103 break;
2104 case HSO_PORT_GPS_CONTROL:
2105 port_type = "GPS control";
2106 break;
2107 case HSO_PORT_APP2:
2108 port_type = "Application2";
2109 break;
2110 case HSO_PORT_PCSC:
2111 port_type = "PCSC";
2112 break;
2113 case HSO_PORT_DIAG:
2114 port_type = "Diagnostic";
2115 break;
2116 case HSO_PORT_DIAG2:
2117 port_type = "Diagnostic2";
2118 break;
2119 case HSO_PORT_MODEM:
2120 port_type = "Modem";
2121 break;
2122 case HSO_PORT_NETWORK:
2123 port_type = "Network";
2124 break;
2125 default:
2126 port_type = "Unknown";
2127 break;
2128 }
2129 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2130 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2131 } else
2132 sprintf(port_dev, "/dev/%s%d", tty_filename,
2133 dev2ser(hso_dev)->minor);
2134
2135 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2136 port_type, port_dev);
2137 }
2138
2139 static int hso_start_net_device(struct hso_device *hso_dev)
2140 {
2141 int i, result = 0;
2142 struct hso_net *hso_net = dev2net(hso_dev);
2143
2144 if (!hso_net)
2145 return -ENODEV;
2146
2147 /* send URBs for all read buffers */
2148 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2149
2150 /* Prep a receive URB */
2151 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2152 hso_dev->usb,
2153 usb_rcvbulkpipe(hso_dev->usb,
2154 hso_net->in_endp->
2155 bEndpointAddress & 0x7F),
2156 hso_net->mux_bulk_rx_buf_pool[i],
2157 MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2158 hso_net);
2159
2160 /* Put it out there so the device can send us stuff */
2161 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2162 GFP_NOIO);
2163 if (result)
2164 dev_warn(&hso_dev->usb->dev,
2165 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2166 i, result);
2167 }
2168
2169 return result;
2170 }
2171
2172 static int hso_stop_net_device(struct hso_device *hso_dev)
2173 {
2174 int i;
2175 struct hso_net *hso_net = dev2net(hso_dev);
2176
2177 if (!hso_net)
2178 return -ENODEV;
2179
2180 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2181 if (hso_net->mux_bulk_rx_urb_pool[i])
2182 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2183
2184 }
2185 if (hso_net->mux_bulk_tx_urb)
2186 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2187
2188 return 0;
2189 }
2190
2191 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2192 {
2193 int i, result = 0;
2194 struct hso_serial *serial = dev2ser(hso_dev);
2195
2196 if (!serial)
2197 return -ENODEV;
2198
2199 /* If it is not the MUX port fill in and submit a bulk urb (already
2200 * allocated in hso_serial_start) */
2201 if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2202 for (i = 0; i < serial->num_rx_urbs; i++) {
2203 usb_fill_bulk_urb(serial->rx_urb[i],
2204 serial->parent->usb,
2205 usb_rcvbulkpipe(serial->parent->usb,
2206 serial->in_endp->
2207 bEndpointAddress &
2208 0x7F),
2209 serial->rx_data[i],
2210 serial->rx_data_length,
2211 hso_std_serial_read_bulk_callback,
2212 serial);
2213 result = usb_submit_urb(serial->rx_urb[i], flags);
2214 if (result) {
2215 dev_warn(&serial->parent->usb->dev,
2216 "Failed to submit urb - res %d\n",
2217 result);
2218 break;
2219 }
2220 }
2221 } else {
2222 mutex_lock(&serial->shared_int->shared_int_lock);
2223 if (!serial->shared_int->use_count) {
2224 result =
2225 hso_mux_submit_intr_urb(serial->shared_int,
2226 hso_dev->usb, flags);
2227 }
2228 serial->shared_int->use_count++;
2229 mutex_unlock(&serial->shared_int->shared_int_lock);
2230 }
2231 if (serial->tiocmget)
2232 tiocmget_submit_urb(serial,
2233 serial->tiocmget,
2234 serial->parent->usb);
2235 return result;
2236 }
2237
2238 static int hso_stop_serial_device(struct hso_device *hso_dev)
2239 {
2240 int i;
2241 struct hso_serial *serial = dev2ser(hso_dev);
2242 struct hso_tiocmget *tiocmget;
2243
2244 if (!serial)
2245 return -ENODEV;
2246
2247 for (i = 0; i < serial->num_rx_urbs; i++) {
2248 if (serial->rx_urb[i]) {
2249 usb_kill_urb(serial->rx_urb[i]);
2250 serial->rx_urb_filled[i] = 0;
2251 }
2252 }
2253 serial->curr_rx_urb_idx = 0;
2254 serial->curr_rx_urb_offset = 0;
2255
2256 if (serial->tx_urb)
2257 usb_kill_urb(serial->tx_urb);
2258
2259 if (serial->shared_int) {
2260 mutex_lock(&serial->shared_int->shared_int_lock);
2261 if (serial->shared_int->use_count &&
2262 (--serial->shared_int->use_count == 0)) {
2263 struct urb *urb;
2264
2265 urb = serial->shared_int->shared_intr_urb;
2266 if (urb)
2267 usb_kill_urb(urb);
2268 }
2269 mutex_unlock(&serial->shared_int->shared_int_lock);
2270 }
2271 tiocmget = serial->tiocmget;
2272 if (tiocmget) {
2273 wake_up_interruptible(&tiocmget->waitq);
2274 usb_kill_urb(tiocmget->urb);
2275 }
2276
2277 return 0;
2278 }
2279
2280 static void hso_serial_common_free(struct hso_serial *serial)
2281 {
2282 int i;
2283
2284 if (serial->parent->dev)
2285 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2286
2287 tty_unregister_device(tty_drv, serial->minor);
2288
2289 for (i = 0; i < serial->num_rx_urbs; i++) {
2290 /* unlink and free RX URB */
2291 usb_free_urb(serial->rx_urb[i]);
2292 /* free the RX buffer */
2293 kfree(serial->rx_data[i]);
2294 }
2295
2296 /* unlink and free TX URB */
2297 usb_free_urb(serial->tx_urb);
2298 kfree(serial->tx_data);
2299 }
2300
2301 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2302 int rx_size, int tx_size)
2303 {
2304 struct device *dev;
2305 int minor;
2306 int i;
2307
2308 minor = get_free_serial_index();
2309 if (minor < 0)
2310 goto exit;
2311
2312 /* register our minor number */
2313 serial->parent->dev = tty_register_device(tty_drv, minor,
2314 &serial->parent->interface->dev);
2315 dev = serial->parent->dev;
2316 dev_set_drvdata(dev, serial->parent);
2317 i = device_create_file(dev, &dev_attr_hsotype);
2318
2319 /* fill in specific data for later use */
2320 serial->minor = minor;
2321 serial->magic = HSO_SERIAL_MAGIC;
2322 spin_lock_init(&serial->serial_lock);
2323 serial->num_rx_urbs = num_urbs;
2324
2325 /* RX, allocate urb and initialize */
2326
2327 /* prepare our RX buffer */
2328 serial->rx_data_length = rx_size;
2329 for (i = 0; i < serial->num_rx_urbs; i++) {
2330 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2331 if (!serial->rx_urb[i]) {
2332 dev_err(dev, "Could not allocate urb?\n");
2333 goto exit;
2334 }
2335 serial->rx_urb[i]->transfer_buffer = NULL;
2336 serial->rx_urb[i]->transfer_buffer_length = 0;
2337 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2338 GFP_KERNEL);
2339 if (!serial->rx_data[i]) {
2340 dev_err(dev, "%s - Out of memory\n", __func__);
2341 goto exit;
2342 }
2343 }
2344
2345 /* TX, allocate urb and initialize */
2346 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2347 if (!serial->tx_urb) {
2348 dev_err(dev, "Could not allocate urb?\n");
2349 goto exit;
2350 }
2351 serial->tx_urb->transfer_buffer = NULL;
2352 serial->tx_urb->transfer_buffer_length = 0;
2353 /* prepare our TX buffer */
2354 serial->tx_data_count = 0;
2355 serial->tx_buffer_count = 0;
2356 serial->tx_data_length = tx_size;
2357 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2358 if (!serial->tx_data) {
2359 dev_err(dev, "%s - Out of memory", __func__);
2360 goto exit;
2361 }
2362 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2363 if (!serial->tx_buffer) {
2364 dev_err(dev, "%s - Out of memory", __func__);
2365 goto exit;
2366 }
2367
2368 return 0;
2369 exit:
2370 hso_serial_common_free(serial);
2371 return -1;
2372 }
2373
2374 /* Creates a general hso device */
2375 static struct hso_device *hso_create_device(struct usb_interface *intf,
2376 int port_spec)
2377 {
2378 struct hso_device *hso_dev;
2379
2380 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2381 if (!hso_dev)
2382 return NULL;
2383
2384 hso_dev->port_spec = port_spec;
2385 hso_dev->usb = interface_to_usbdev(intf);
2386 hso_dev->interface = intf;
2387 kref_init(&hso_dev->ref);
2388 mutex_init(&hso_dev->mutex);
2389
2390 INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2391 INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2392
2393 return hso_dev;
2394 }
2395
2396 /* Removes a network device in the network device table */
2397 static int remove_net_device(struct hso_device *hso_dev)
2398 {
2399 int i;
2400
2401 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2402 if (network_table[i] == hso_dev) {
2403 network_table[i] = NULL;
2404 break;
2405 }
2406 }
2407 if (i == HSO_MAX_NET_DEVICES)
2408 return -1;
2409 return 0;
2410 }
2411
2412 /* Frees our network device */
2413 static void hso_free_net_device(struct hso_device *hso_dev)
2414 {
2415 int i;
2416 struct hso_net *hso_net = dev2net(hso_dev);
2417
2418 if (!hso_net)
2419 return;
2420
2421 remove_net_device(hso_net->parent);
2422
2423 if (hso_net->net) {
2424 unregister_netdev(hso_net->net);
2425 free_netdev(hso_net->net);
2426 }
2427
2428 /* start freeing */
2429 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2430 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2431 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2432 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2433 }
2434 usb_free_urb(hso_net->mux_bulk_tx_urb);
2435 kfree(hso_net->mux_bulk_tx_buf);
2436 hso_net->mux_bulk_tx_buf = NULL;
2437
2438 kfree(hso_dev);
2439 }
2440
2441 static const struct net_device_ops hso_netdev_ops = {
2442 .ndo_open = hso_net_open,
2443 .ndo_stop = hso_net_close,
2444 .ndo_start_xmit = hso_net_start_xmit,
2445 .ndo_tx_timeout = hso_net_tx_timeout,
2446 };
2447
2448 /* initialize the network interface */
2449 static void hso_net_init(struct net_device *net)
2450 {
2451 struct hso_net *hso_net = netdev_priv(net);
2452
2453 D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2454
2455 /* fill in the other fields */
2456 net->netdev_ops = &hso_netdev_ops;
2457 net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2458 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2459 net->type = ARPHRD_NONE;
2460 net->mtu = DEFAULT_MTU - 14;
2461 net->tx_queue_len = 10;
2462 SET_ETHTOOL_OPS(net, &ops);
2463
2464 /* and initialize the semaphore */
2465 spin_lock_init(&hso_net->net_lock);
2466 }
2467
2468 /* Adds a network device in the network device table */
2469 static int add_net_device(struct hso_device *hso_dev)
2470 {
2471 int i;
2472
2473 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2474 if (network_table[i] == NULL) {
2475 network_table[i] = hso_dev;
2476 break;
2477 }
2478 }
2479 if (i == HSO_MAX_NET_DEVICES)
2480 return -1;
2481 return 0;
2482 }
2483
2484 static int hso_rfkill_set_block(void *data, bool blocked)
2485 {
2486 struct hso_device *hso_dev = data;
2487 int enabled = !blocked;
2488 int rv;
2489
2490 mutex_lock(&hso_dev->mutex);
2491 if (hso_dev->usb_gone)
2492 rv = 0;
2493 else
2494 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2495 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2496 USB_CTRL_SET_TIMEOUT);
2497 mutex_unlock(&hso_dev->mutex);
2498 return rv;
2499 }
2500
2501 static const struct rfkill_ops hso_rfkill_ops = {
2502 .set_block = hso_rfkill_set_block,
2503 };
2504
2505 /* Creates and sets up everything for rfkill */
2506 static void hso_create_rfkill(struct hso_device *hso_dev,
2507 struct usb_interface *interface)
2508 {
2509 struct hso_net *hso_net = dev2net(hso_dev);
2510 struct device *dev = &hso_net->net->dev;
2511 char *rfkn;
2512
2513 rfkn = kzalloc(20, GFP_KERNEL);
2514 if (!rfkn)
2515 dev_err(dev, "%s - Out of memory\n", __func__);
2516
2517 snprintf(rfkn, 20, "hso-%d",
2518 interface->altsetting->desc.bInterfaceNumber);
2519
2520 hso_net->rfkill = rfkill_alloc(rfkn,
2521 &interface_to_usbdev(interface)->dev,
2522 RFKILL_TYPE_WWAN,
2523 &hso_rfkill_ops, hso_dev);
2524 if (!hso_net->rfkill) {
2525 dev_err(dev, "%s - Out of memory\n", __func__);
2526 kfree(rfkn);
2527 return;
2528 }
2529 if (rfkill_register(hso_net->rfkill) < 0) {
2530 rfkill_destroy(hso_net->rfkill);
2531 kfree(rfkn);
2532 hso_net->rfkill = NULL;
2533 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2534 return;
2535 }
2536 }
2537
2538 static struct device_type hso_type = {
2539 .name = "wwan",
2540 };
2541
2542 /* Creates our network device */
2543 static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2544 int port_spec)
2545 {
2546 int result, i;
2547 struct net_device *net;
2548 struct hso_net *hso_net;
2549 struct hso_device *hso_dev;
2550
2551 hso_dev = hso_create_device(interface, port_spec);
2552 if (!hso_dev)
2553 return NULL;
2554
2555 /* allocate our network device, then we can put in our private data */
2556 /* call hso_net_init to do the basic initialization */
2557 net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2558 if (!net) {
2559 dev_err(&interface->dev, "Unable to create ethernet device\n");
2560 goto exit;
2561 }
2562
2563 hso_net = netdev_priv(net);
2564
2565 hso_dev->port_data.dev_net = hso_net;
2566 hso_net->net = net;
2567 hso_net->parent = hso_dev;
2568
2569 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2570 USB_DIR_IN);
2571 if (!hso_net->in_endp) {
2572 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2573 goto exit;
2574 }
2575 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2576 USB_DIR_OUT);
2577 if (!hso_net->out_endp) {
2578 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2579 goto exit;
2580 }
2581 SET_NETDEV_DEV(net, &interface->dev);
2582 SET_NETDEV_DEVTYPE(net, &hso_type);
2583
2584 /* registering our net device */
2585 result = register_netdev(net);
2586 if (result) {
2587 dev_err(&interface->dev, "Failed to register device\n");
2588 goto exit;
2589 }
2590
2591 /* start allocating */
2592 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2593 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2594 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2595 dev_err(&interface->dev, "Could not allocate rx urb\n");
2596 goto exit;
2597 }
2598 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2599 GFP_KERNEL);
2600 if (!hso_net->mux_bulk_rx_buf_pool[i]) {
2601 dev_err(&interface->dev, "Could not allocate rx buf\n");
2602 goto exit;
2603 }
2604 }
2605 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2606 if (!hso_net->mux_bulk_tx_urb) {
2607 dev_err(&interface->dev, "Could not allocate tx urb\n");
2608 goto exit;
2609 }
2610 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2611 if (!hso_net->mux_bulk_tx_buf) {
2612 dev_err(&interface->dev, "Could not allocate tx buf\n");
2613 goto exit;
2614 }
2615
2616 add_net_device(hso_dev);
2617
2618 hso_log_port(hso_dev);
2619
2620 hso_create_rfkill(hso_dev, interface);
2621
2622 return hso_dev;
2623 exit:
2624 hso_free_net_device(hso_dev);
2625 return NULL;
2626 }
2627
2628 static void hso_free_tiomget(struct hso_serial *serial)
2629 {
2630 struct hso_tiocmget *tiocmget = serial->tiocmget;
2631 if (tiocmget) {
2632 if (tiocmget->urb) {
2633 usb_free_urb(tiocmget->urb);
2634 tiocmget->urb = NULL;
2635 }
2636 serial->tiocmget = NULL;
2637 kfree(tiocmget);
2638
2639 }
2640 }
2641
2642 /* Frees an AT channel ( goes for both mux and non-mux ) */
2643 static void hso_free_serial_device(struct hso_device *hso_dev)
2644 {
2645 struct hso_serial *serial = dev2ser(hso_dev);
2646
2647 if (!serial)
2648 return;
2649 set_serial_by_index(serial->minor, NULL);
2650
2651 hso_serial_common_free(serial);
2652
2653 if (serial->shared_int) {
2654 mutex_lock(&serial->shared_int->shared_int_lock);
2655 if (--serial->shared_int->ref_count == 0)
2656 hso_free_shared_int(serial->shared_int);
2657 else
2658 mutex_unlock(&serial->shared_int->shared_int_lock);
2659 }
2660 hso_free_tiomget(serial);
2661 kfree(serial);
2662 kfree(hso_dev);
2663 }
2664
2665 /* Creates a bulk AT channel */
2666 static struct hso_device *hso_create_bulk_serial_device(
2667 struct usb_interface *interface, int port)
2668 {
2669 struct hso_device *hso_dev;
2670 struct hso_serial *serial;
2671 int num_urbs;
2672 struct hso_tiocmget *tiocmget;
2673
2674 hso_dev = hso_create_device(interface, port);
2675 if (!hso_dev)
2676 return NULL;
2677
2678 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2679 if (!serial)
2680 goto exit;
2681
2682 serial->parent = hso_dev;
2683 hso_dev->port_data.dev_serial = serial;
2684
2685 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2686 num_urbs = 2;
2687 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2688 GFP_KERNEL);
2689 /* it isn't going to break our heart if serial->tiocmget
2690 * allocation fails don't bother checking this.
2691 */
2692 if (serial->tiocmget) {
2693 tiocmget = serial->tiocmget;
2694 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2695 if (tiocmget->urb) {
2696 mutex_init(&tiocmget->mutex);
2697 init_waitqueue_head(&tiocmget->waitq);
2698 tiocmget->endp = hso_get_ep(
2699 interface,
2700 USB_ENDPOINT_XFER_INT,
2701 USB_DIR_IN);
2702 } else
2703 hso_free_tiomget(serial);
2704 }
2705 }
2706 else
2707 num_urbs = 1;
2708
2709 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2710 BULK_URB_TX_SIZE))
2711 goto exit;
2712
2713 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2714 USB_DIR_IN);
2715 if (!serial->in_endp) {
2716 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2717 goto exit2;
2718 }
2719
2720 if (!
2721 (serial->out_endp =
2722 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2723 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2724 goto exit2;
2725 }
2726
2727 serial->write_data = hso_std_serial_write_data;
2728
2729 /* and record this serial */
2730 set_serial_by_index(serial->minor, serial);
2731
2732 /* setup the proc dirs and files if needed */
2733 hso_log_port(hso_dev);
2734
2735 /* done, return it */
2736 return hso_dev;
2737
2738 exit2:
2739 hso_serial_common_free(serial);
2740 exit:
2741 hso_free_tiomget(serial);
2742 kfree(serial);
2743 kfree(hso_dev);
2744 return NULL;
2745 }
2746
2747 /* Creates a multiplexed AT channel */
2748 static
2749 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2750 int port,
2751 struct hso_shared_int *mux)
2752 {
2753 struct hso_device *hso_dev;
2754 struct hso_serial *serial;
2755 int port_spec;
2756
2757 port_spec = HSO_INTF_MUX;
2758 port_spec &= ~HSO_PORT_MASK;
2759
2760 port_spec |= hso_mux_to_port(port);
2761 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2762 return NULL;
2763
2764 hso_dev = hso_create_device(interface, port_spec);
2765 if (!hso_dev)
2766 return NULL;
2767
2768 serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2769 if (!serial)
2770 goto exit;
2771
2772 hso_dev->port_data.dev_serial = serial;
2773 serial->parent = hso_dev;
2774
2775 if (hso_serial_common_create
2776 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2777 goto exit;
2778
2779 serial->tx_data_length--;
2780 serial->write_data = hso_mux_serial_write_data;
2781
2782 serial->shared_int = mux;
2783 mutex_lock(&serial->shared_int->shared_int_lock);
2784 serial->shared_int->ref_count++;
2785 mutex_unlock(&serial->shared_int->shared_int_lock);
2786
2787 /* and record this serial */
2788 set_serial_by_index(serial->minor, serial);
2789
2790 /* setup the proc dirs and files if needed */
2791 hso_log_port(hso_dev);
2792
2793 /* done, return it */
2794 return hso_dev;
2795
2796 exit:
2797 if (serial) {
2798 tty_unregister_device(tty_drv, serial->minor);
2799 kfree(serial);
2800 }
2801 if (hso_dev)
2802 kfree(hso_dev);
2803 return NULL;
2804
2805 }
2806
2807 static void hso_free_shared_int(struct hso_shared_int *mux)
2808 {
2809 usb_free_urb(mux->shared_intr_urb);
2810 kfree(mux->shared_intr_buf);
2811 mutex_unlock(&mux->shared_int_lock);
2812 kfree(mux);
2813 }
2814
2815 static
2816 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2817 {
2818 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2819
2820 if (!mux)
2821 return NULL;
2822
2823 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2824 USB_DIR_IN);
2825 if (!mux->intr_endp) {
2826 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2827 goto exit;
2828 }
2829
2830 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2831 if (!mux->shared_intr_urb) {
2832 dev_err(&interface->dev, "Could not allocate intr urb?");
2833 goto exit;
2834 }
2835 mux->shared_intr_buf = kzalloc(mux->intr_endp->wMaxPacketSize,
2836 GFP_KERNEL);
2837 if (!mux->shared_intr_buf) {
2838 dev_err(&interface->dev, "Could not allocate intr buf?");
2839 goto exit;
2840 }
2841
2842 mutex_init(&mux->shared_int_lock);
2843
2844 return mux;
2845
2846 exit:
2847 kfree(mux->shared_intr_buf);
2848 usb_free_urb(mux->shared_intr_urb);
2849 kfree(mux);
2850 return NULL;
2851 }
2852
2853 /* Gets the port spec for a certain interface */
2854 static int hso_get_config_data(struct usb_interface *interface)
2855 {
2856 struct usb_device *usbdev = interface_to_usbdev(interface);
2857 u8 config_data[17];
2858 u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2859 s32 result;
2860
2861 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2862 0x86, 0xC0, 0, 0, config_data, 17,
2863 USB_CTRL_SET_TIMEOUT) != 0x11) {
2864 return -EIO;
2865 }
2866
2867 switch (config_data[if_num]) {
2868 case 0x0:
2869 result = 0;
2870 break;
2871 case 0x1:
2872 result = HSO_PORT_DIAG;
2873 break;
2874 case 0x2:
2875 result = HSO_PORT_GPS;
2876 break;
2877 case 0x3:
2878 result = HSO_PORT_GPS_CONTROL;
2879 break;
2880 case 0x4:
2881 result = HSO_PORT_APP;
2882 break;
2883 case 0x5:
2884 result = HSO_PORT_APP2;
2885 break;
2886 case 0x6:
2887 result = HSO_PORT_CONTROL;
2888 break;
2889 case 0x7:
2890 result = HSO_PORT_NETWORK;
2891 break;
2892 case 0x8:
2893 result = HSO_PORT_MODEM;
2894 break;
2895 case 0x9:
2896 result = HSO_PORT_MSD;
2897 break;
2898 case 0xa:
2899 result = HSO_PORT_PCSC;
2900 break;
2901 case 0xb:
2902 result = HSO_PORT_VOICE;
2903 break;
2904 default:
2905 result = 0;
2906 }
2907
2908 if (result)
2909 result |= HSO_INTF_BULK;
2910
2911 if (config_data[16] & 0x1)
2912 result |= HSO_INFO_CRC_BUG;
2913
2914 return result;
2915 }
2916
2917 /* called once for each interface upon device insertion */
2918 static int hso_probe(struct usb_interface *interface,
2919 const struct usb_device_id *id)
2920 {
2921 int mux, i, if_num, port_spec;
2922 unsigned char port_mask;
2923 struct hso_device *hso_dev = NULL;
2924 struct hso_shared_int *shared_int;
2925 struct hso_device *tmp_dev = NULL;
2926
2927 if_num = interface->altsetting->desc.bInterfaceNumber;
2928
2929 /* Get the interface/port specification from either driver_info or from
2930 * the device itself */
2931 if (id->driver_info)
2932 port_spec = ((u32 *)(id->driver_info))[if_num];
2933 else
2934 port_spec = hso_get_config_data(interface);
2935
2936 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2937 dev_err(&interface->dev, "Not our interface\n");
2938 return -ENODEV;
2939 }
2940 /* Check if we need to switch to alt interfaces prior to port
2941 * configuration */
2942 if (interface->num_altsetting > 1)
2943 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2944 interface->needs_remote_wakeup = 1;
2945
2946 /* Allocate new hso device(s) */
2947 switch (port_spec & HSO_INTF_MASK) {
2948 case HSO_INTF_MUX:
2949 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2950 /* Create the network device */
2951 if (!disable_net) {
2952 hso_dev = hso_create_net_device(interface,
2953 port_spec);
2954 if (!hso_dev)
2955 goto exit;
2956 tmp_dev = hso_dev;
2957 }
2958 }
2959
2960 if (hso_get_mux_ports(interface, &port_mask))
2961 /* TODO: de-allocate everything */
2962 goto exit;
2963
2964 shared_int = hso_create_shared_int(interface);
2965 if (!shared_int)
2966 goto exit;
2967
2968 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2969 if (port_mask & i) {
2970 hso_dev = hso_create_mux_serial_device(
2971 interface, i, shared_int);
2972 if (!hso_dev)
2973 goto exit;
2974 }
2975 }
2976
2977 if (tmp_dev)
2978 hso_dev = tmp_dev;
2979 break;
2980
2981 case HSO_INTF_BULK:
2982 /* It's a regular bulk interface */
2983 if (((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK)
2984 && !disable_net)
2985 hso_dev = hso_create_net_device(interface, port_spec);
2986 else
2987 hso_dev =
2988 hso_create_bulk_serial_device(interface, port_spec);
2989 if (!hso_dev)
2990 goto exit;
2991 break;
2992 default:
2993 goto exit;
2994 }
2995
2996 /* save our data pointer in this device */
2997 usb_set_intfdata(interface, hso_dev);
2998
2999 /* done */
3000 return 0;
3001 exit:
3002 hso_free_interface(interface);
3003 return -ENODEV;
3004 }
3005
3006 /* device removed, cleaning up */
3007 static void hso_disconnect(struct usb_interface *interface)
3008 {
3009 hso_free_interface(interface);
3010
3011 /* remove reference of our private data */
3012 usb_set_intfdata(interface, NULL);
3013 }
3014
3015 static void async_get_intf(struct work_struct *data)
3016 {
3017 struct hso_device *hso_dev =
3018 container_of(data, struct hso_device, async_get_intf);
3019 usb_autopm_get_interface(hso_dev->interface);
3020 }
3021
3022 static void async_put_intf(struct work_struct *data)
3023 {
3024 struct hso_device *hso_dev =
3025 container_of(data, struct hso_device, async_put_intf);
3026 usb_autopm_put_interface(hso_dev->interface);
3027 }
3028
3029 static int hso_get_activity(struct hso_device *hso_dev)
3030 {
3031 if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
3032 if (!hso_dev->is_active) {
3033 hso_dev->is_active = 1;
3034 schedule_work(&hso_dev->async_get_intf);
3035 }
3036 }
3037
3038 if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3039 return -EAGAIN;
3040
3041 usb_mark_last_busy(hso_dev->usb);
3042
3043 return 0;
3044 }
3045
3046 static int hso_put_activity(struct hso_device *hso_dev)
3047 {
3048 if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3049 if (hso_dev->is_active) {
3050 hso_dev->is_active = 0;
3051 schedule_work(&hso_dev->async_put_intf);
3052 return -EAGAIN;
3053 }
3054 }
3055 hso_dev->is_active = 0;
3056 return 0;
3057 }
3058
3059 /* called by kernel when we need to suspend device */
3060 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3061 {
3062 int i, result;
3063
3064 /* Stop all serial ports */
3065 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3066 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3067 result = hso_stop_serial_device(serial_table[i]);
3068 if (result)
3069 goto out;
3070 }
3071 }
3072
3073 /* Stop all network ports */
3074 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3075 if (network_table[i] &&
3076 (network_table[i]->interface == iface)) {
3077 result = hso_stop_net_device(network_table[i]);
3078 if (result)
3079 goto out;
3080 }
3081 }
3082
3083 out:
3084 return 0;
3085 }
3086
3087 /* called by kernel when we need to resume device */
3088 static int hso_resume(struct usb_interface *iface)
3089 {
3090 int i, result = 0;
3091 struct hso_net *hso_net;
3092
3093 /* Start all serial ports */
3094 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3095 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3096 if (dev2ser(serial_table[i])->open_count) {
3097 result =
3098 hso_start_serial_device(serial_table[i], GFP_NOIO);
3099 hso_kick_transmit(dev2ser(serial_table[i]));
3100 if (result)
3101 goto out;
3102 }
3103 }
3104 }
3105
3106 /* Start all network ports */
3107 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3108 if (network_table[i] &&
3109 (network_table[i]->interface == iface)) {
3110 hso_net = dev2net(network_table[i]);
3111 if (hso_net->flags & IFF_UP) {
3112 /* First transmit any lingering data,
3113 then restart the device. */
3114 if (hso_net->skb_tx_buf) {
3115 dev_dbg(&iface->dev,
3116 "Transmitting"
3117 " lingering data\n");
3118 hso_net_start_xmit(hso_net->skb_tx_buf,
3119 hso_net->net);
3120 hso_net->skb_tx_buf = NULL;
3121 }
3122 result = hso_start_net_device(network_table[i]);
3123 if (result)
3124 goto out;
3125 }
3126 }
3127 }
3128
3129 out:
3130 return result;
3131 }
3132
3133 static void hso_serial_ref_free(struct kref *ref)
3134 {
3135 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3136
3137 hso_free_serial_device(hso_dev);
3138 }
3139
3140 static void hso_free_interface(struct usb_interface *interface)
3141 {
3142 struct hso_serial *hso_dev;
3143 struct tty_struct *tty;
3144 int i;
3145
3146 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3147 if (serial_table[i]
3148 && (serial_table[i]->interface == interface)) {
3149 hso_dev = dev2ser(serial_table[i]);
3150 spin_lock_irq(&hso_dev->serial_lock);
3151 tty = tty_kref_get(hso_dev->tty);
3152 spin_unlock_irq(&hso_dev->serial_lock);
3153 if (tty)
3154 tty_hangup(tty);
3155 mutex_lock(&hso_dev->parent->mutex);
3156 tty_kref_put(tty);
3157 hso_dev->parent->usb_gone = 1;
3158 mutex_unlock(&hso_dev->parent->mutex);
3159 kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3160 }
3161 }
3162
3163 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3164 if (network_table[i]
3165 && (network_table[i]->interface == interface)) {
3166 struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3167 /* hso_stop_net_device doesn't stop the net queue since
3168 * traffic needs to start it again when suspended */
3169 netif_stop_queue(dev2net(network_table[i])->net);
3170 hso_stop_net_device(network_table[i]);
3171 cancel_work_sync(&network_table[i]->async_put_intf);
3172 cancel_work_sync(&network_table[i]->async_get_intf);
3173 if (rfk) {
3174 rfkill_unregister(rfk);
3175 rfkill_destroy(rfk);
3176 }
3177 hso_free_net_device(network_table[i]);
3178 }
3179 }
3180 }
3181
3182 /* Helper functions */
3183
3184 /* Get the endpoint ! */
3185 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3186 int type, int dir)
3187 {
3188 int i;
3189 struct usb_host_interface *iface = intf->cur_altsetting;
3190 struct usb_endpoint_descriptor *endp;
3191
3192 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3193 endp = &iface->endpoint[i].desc;
3194 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3195 (usb_endpoint_type(endp) == type))
3196 return endp;
3197 }
3198
3199 return NULL;
3200 }
3201
3202 /* Get the byte that describes which ports are enabled */
3203 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3204 {
3205 int i;
3206 struct usb_host_interface *iface = intf->cur_altsetting;
3207
3208 if (iface->extralen == 3) {
3209 *ports = iface->extra[2];
3210 return 0;
3211 }
3212
3213 for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3214 if (iface->endpoint[i].extralen == 3) {
3215 *ports = iface->endpoint[i].extra[2];
3216 return 0;
3217 }
3218 }
3219
3220 return -1;
3221 }
3222
3223 /* interrupt urb needs to be submitted, used for serial read of muxed port */
3224 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3225 struct usb_device *usb, gfp_t gfp)
3226 {
3227 int result;
3228
3229 usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3230 usb_rcvintpipe(usb,
3231 shared_int->intr_endp->bEndpointAddress & 0x7F),
3232 shared_int->shared_intr_buf,
3233 shared_int->intr_endp->wMaxPacketSize,
3234 intr_callback, shared_int,
3235 shared_int->intr_endp->bInterval);
3236
3237 result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3238 if (result)
3239 dev_warn(&usb->dev, "%s failed mux_intr_urb %d", __func__,
3240 result);
3241
3242 return result;
3243 }
3244
3245 /* operations setup of the serial interface */
3246 static const struct tty_operations hso_serial_ops = {
3247 .open = hso_serial_open,
3248 .close = hso_serial_close,
3249 .write = hso_serial_write,
3250 .write_room = hso_serial_write_room,
3251 .ioctl = hso_serial_ioctl,
3252 .set_termios = hso_serial_set_termios,
3253 .chars_in_buffer = hso_serial_chars_in_buffer,
3254 .tiocmget = hso_serial_tiocmget,
3255 .tiocmset = hso_serial_tiocmset,
3256 .unthrottle = hso_unthrottle
3257 };
3258
3259 static struct usb_driver hso_driver = {
3260 .name = driver_name,
3261 .probe = hso_probe,
3262 .disconnect = hso_disconnect,
3263 .id_table = hso_ids,
3264 .suspend = hso_suspend,
3265 .resume = hso_resume,
3266 .reset_resume = hso_resume,
3267 .supports_autosuspend = 1,
3268 };
3269
3270 static int __init hso_init(void)
3271 {
3272 int i;
3273 int result;
3274
3275 /* put it in the log */
3276 printk(KERN_INFO "hso: %s\n", version);
3277
3278 /* Initialise the serial table semaphore and table */
3279 spin_lock_init(&serial_table_lock);
3280 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3281 serial_table[i] = NULL;
3282
3283 /* allocate our driver using the proper amount of supported minors */
3284 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3285 if (!tty_drv)
3286 return -ENOMEM;
3287
3288 /* fill in all needed values */
3289 tty_drv->magic = TTY_DRIVER_MAGIC;
3290 tty_drv->owner = THIS_MODULE;
3291 tty_drv->driver_name = driver_name;
3292 tty_drv->name = tty_filename;
3293
3294 /* if major number is provided as parameter, use that one */
3295 if (tty_major)
3296 tty_drv->major = tty_major;
3297
3298 tty_drv->minor_start = 0;
3299 tty_drv->num = HSO_SERIAL_TTY_MINORS;
3300 tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3301 tty_drv->subtype = SERIAL_TYPE_NORMAL;
3302 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3303 tty_drv->init_termios = tty_std_termios;
3304 hso_init_termios(&tty_drv->init_termios);
3305 tty_set_operations(tty_drv, &hso_serial_ops);
3306
3307 /* register the tty driver */
3308 result = tty_register_driver(tty_drv);
3309 if (result) {
3310 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3311 __func__, result);
3312 return result;
3313 }
3314
3315 /* register this module as an usb driver */
3316 result = usb_register(&hso_driver);
3317 if (result) {
3318 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3319 result);
3320 /* cleanup serial interface */
3321 tty_unregister_driver(tty_drv);
3322 return result;
3323 }
3324
3325 /* done */
3326 return 0;
3327 }
3328
3329 static void __exit hso_exit(void)
3330 {
3331 printk(KERN_INFO "hso: unloaded\n");
3332
3333 tty_unregister_driver(tty_drv);
3334 /* deregister the usb driver */
3335 usb_deregister(&hso_driver);
3336 }
3337
3338 /* Module definitions */
3339 module_init(hso_init);
3340 module_exit(hso_exit);
3341
3342 MODULE_AUTHOR(MOD_AUTHOR);
3343 MODULE_DESCRIPTION(MOD_DESCRIPTION);
3344 MODULE_LICENSE(MOD_LICENSE);
3345 MODULE_INFO(Version, DRIVER_VERSION);
3346
3347 /* change the debug level (eg: insmod hso.ko debug=0x04) */
3348 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3349 module_param(debug, int, S_IRUGO | S_IWUSR);
3350
3351 /* set the major tty number (eg: insmod hso.ko tty_major=245) */
3352 MODULE_PARM_DESC(tty_major, "Set the major tty number");
3353 module_param(tty_major, int, S_IRUGO | S_IWUSR);
3354
3355 /* disable network interface (eg: insmod hso.ko disable_net=1) */
3356 MODULE_PARM_DESC(disable_net, "Disable the network interface");
3357 module_param(disable_net, int, S_IRUGO | S_IWUSR);
Linux with added FPC-III support